// File: contracts/Echos.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Neural Echos
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                                                                                                                                                                                                                                    //
//                                                                                                                                                                                                                                                                                                                    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWMMMMMMMMMMMMMMMMMMWNNNWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXd:;:dXMMMMMMMMMMMWKx:,'.':kNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNx' .:lcdXMMMMMMMMMKl.  .:lolcoKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNl..lKWMWOOWMMMMMMMO,  .oKWMMMWkxNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNo. lNMMMMXKWMMMMMM0,  .dWMMMMMMXdkMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO. .xMMMMNdoXMMMMMK;   .xWMMMMMM0,cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNc   :KWN0c.:NMMMMWd.    'kNMMWXx' cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0'    .,'. .dWMMMMNl      .,::;.  .dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO.         ;KMMMMMWl              ;KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0'        .kWMMMMMMk.            ,0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX:       .kWMMMMMMMK;           'OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO'    .:0WMMMMMMMMM0;        .lKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXOOKWMMN0OK0o::lONMMMMMMMMMMMMNkc,..'cxKWW0xkXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNx'  cXM0; .xWMMWMMMMMMMMMMMMMMMMMMWNNNWMMMWO, 'xNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNNNWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0xdkOKWMWWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKd,   .kNk' .oNNK00XWMWNNNWMMNNNNNXXXX00NWX0O0KOl..,dKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKOxdOXOc,'.,dNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO'    .ll;,;cxXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN0d:.    .oOc. .co:'. ..cKO;.,kWNl'..,,.....,:.   ..,,.. .:xKNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWd.    ..     .dNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk'            .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNKOdc'...     ':.   ..  .'.   c:   dWNc    .           'c,.      .,cd0XWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNc             .dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0'             .xMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWNKOkdl;'...,cdl.              .cl'   ..  .dWWd..  ..   .lOxc:,,:,.           .,coxOKXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWd.             ;KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWX0l.             ;KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWNXK0Okdc;,..    .;lxKNNd.                          .dMMOc.   .    cXMMK;     .;:.            ..,:coONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0'   ..         ,cdOXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMWXXNWMWXOo;..        .;c'  .lNMMMMMMMMMMMMMMMMMMMMMMMMWNXK0Okdolc;,'..        .,cdOXWMMMNl.             ,oll;'''''.   .xMMKx,   ..    :KMNl     c0Ko.          ....';cdkOOOOOOOO00KXXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNx' .o0k:.          .:d0Kxold0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMNk:...:o:.           .c0N0; .xNMMMMMMMMMMMMMWWNXKOkxolc:;'...                   .;lxOXNWMXl       ,:.     ,dxl,...';.    :0Kd;.    ..    ;0MXo.    ..       ......''......         ..'cOWMMMMWNXXKKKXXNWMMMMMMMMMMMMMMMMMK; .dXNk:.           ..    .:OWMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMW0;                  'o0WXo. .kWMMMMWNXKOkdol:;,...                     .',.           .':l:.    .,xNk.            .lx'     ..        ..    ,OWWKd;..     ..:xOo,.                   'cx0KOxoc:,'.......';cd0NMMMMMMMMMMMMMM0;  ;OWWKo'                 .kMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMK;                .:xXWNk,  ,kWMMMWO:'..                              ,d0NWXOdc,.            .lOO0NMMNx;.       .'l0WWd.              ..    .:KMMMWX0kxxxO0XWMK,         .,coxxdoc;;cll:'.                  .;OWMMMMMMMMMMWWMKl. .c0WMNk:                'xKWMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMWKkl'               .c0WMW0:. .lKMNKXMM0;                                 .,lkKWMMMNKko:'.     .cOWMMMMMMMMWXOxdoodk0kooodoc:'....;:lo::ccokkxxO0KNMMMMMMMMMMMMMMMX:         'dOOOxoc:'.                          .OMMMMMMMMMNdlKWWk,  .dNMMNk;.               .;oONMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMWXx;.                .l0WMMNd.  'kWMXc'xWMMXo.                   .',.            .,lkKNMMMWNKkdc:l0WMMMMMMMMMMMMMMMMMMMK,     '0NXKKXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMKl.                                             oWMMMMMMMMNc ,0MMXl.  ;OWMMW0c.                .;o0NMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMWKd:.                  :KWMMNk;  .cKMMX:  lNMMMWk,              .,cx0NWKx;.             .,cx0NWMMMMMMMWWNXXXXNWWMMMMMMMMMWo      ;KMMMMMMMMMMMMMMMMMMMMMMMMMMWNNNNNNWWMMMMWO:.                        .;:c;.            .dMMMMMMMMWx.  ,OWMNx'  .c0WMMNd,.                 .,oKWMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMW0c.                   'oXMMW0:.  'xNNXx,   .x00NWMXl.           .oXMMMMMMMWKd;.              .:0MMNKkoc;'.....',;cdONMMMMM0'      cNMMMMMMMMMMMMMMMMMMMMMN0dl:,'...'',;coxOXWWKd;.                .;cd0XWMMNc            ,KMMMMNkl:::.   .;dXMK:   .lKWWKc.    .               .oXMMMMMMMMMMMMMM    //
//    MMMMMMMMMMXo.                ...   ,kNKc.   ;0WWx'    .:,..'oNMWO;           .;xXMMMMMMMMWKd:.          .:k0kc'.               .,xNMMNl       lKOxolloddOXWMMMMMMMWXo'.                .;lkXNKkoc;'....',:coxOXWMMMMMWKl.           .kWMMWNx.   'l.    .kMMXo.   'od'   ...                  ;0MMMMMMMMMMMMM    //
//    MMMMMMMMMXc             .''.   ...  .,.   ,o0WMWl     ;c.   .lx0NXd.            'o0WMMMMMMMMWKkc'.    .:xxc.                      cXMO.       ..         .;dXMMMMWk'                       .:xXWMWNNNXNNNXkl;;okKKKOd:.            'kWNOl;..     '.    .xMMWNKo.      ...  .::;'.             :XMMMMMMMMMMMM    //
//    MMMMMMMMMk.             ..,cl:. .'.     .oXWWMMN:              .'lOOl.            .:xXWMMMMMMMMMN0dc;cdo,           ..'..          lKc                      'dNMWk.           ....            .l0WMMMN0d:.      ...               :00o,                 oWMMMMW0;    .'. .od:.                .OMMMMMMMMMMMM    //
//    MMMMMMMMWd                  .ok;  ..   ,OWMWWMMK;                 .;dx:.             .ckXWMMMMMMMMMWXd'           ,o0XNN0l.        'c.                        lXX;         'd0KXX0xc.           .lK0l,.                         'dkc.                   cXMMNWMMK,   .. ,kd.           ..     .kMMMMMMMMMMMM    //
//    MMMMMMMMWo     .,.            lO; ..   oWMWXNWNx.                    'od:.              'lkXMMMMMMWO;           'xNMMMMMMK;         .          .;cc,.         .dk.        .OMMMMMMMWKo.           .;.                         .lxc.                   . .cxK0OWMN:  .. .kx.            .;.    .kMMMMMMMMMMMM    //
//    MMMMMMMMWl     ;,             .xx.    .xMNkodc,. ''                    'ox:.               'ckXWMNx.           ;0WMMMMMMMXl..                .cKWMMNd.         ,c.        '0MMMMMMMMMW0;           .:l,.                   .;dkl.                    .l:   .''c0Kc     ;O:              ;;    .kMMMMMMMMMMMM    //
//    MMMMMMMMWl    .:'              lx.     l0l...   .c;                     .lkkc.                .:dl.           :KMMMMMMMMMMWX0Oxolc,.         cNMMMMMX;         .'.        .dWMMMMMMMMMMXc           .oXOl,.             .;d0XKxol;.                   ..    ...dk,     'x;              ;;    .xMMMMMMMMMMMM    //
//    MMMMMMMMWl     :;             .ol      lKo.:;                        .ckK0OKX0o'                             ,0MMMMMMMMMMMMMMMMMMWx.        .kMMMMMMNc          ..         '0MMMMMMMMMMMK,           'OMMWKkoc:;,,,;:ldOXWMNKKWMMWk'                       .dx:xXo      cc             ':.    .xMMMMMMMMMMMM    //
//    MMMMMMMMWl     .:,            ':.  .  'OOlx0;                       'xNMMMMXKWWXx;.           .c,            oWMMMMMMMNK0XNWMMMMMX:         '0MMMMMMNc                      ;0MMMMMMMMMMWl            dWMMMMMMMWWWWWMMMMMMMNNWMMMMMKc.                      ,O0ldo.  .   ''          .,;.     .OMMMMMMMMMMMM    //
//    MMMMMMMMMO'     .';'.       ...   ..  'clO0;                      .l0WMMMMMMWWMMMW0l'        ,OK;            lWMMMMMW0:...';codk0o.         ;XMMMMMMWl.          .           'kNMMMMMMMM0,            oWMMMMMMMMMMMMMMMMMMMWWMMMMMMMNO:..                    .x0o,.  ..   ... .....'',.      ;kWMMMMMMMMMMMM    //
//    MMMMMMMMMMKl.      .'.....  ..   ..   .o0k'                    .:l0WMMMMMMMNXWMMMMMWXkc.   .lXMX:            .ck0K0kc.                      cNMMMMMMWo.          ..           .;d0XNNKOl.            .kMMMMMMMMMMMMMMMMMMMMXkkXWMMMMMMX0O;                    .lKk,   ..        ....       .oNMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMWx.                   .. .;k0l.                    .xWWMMMMWX0OolOWMMMMMMMMWXxllOWMMWx.              ...                         oWMMMMMMWd'.         .:,             ..'..               :XMMMMMMMMMMMMMMMMMMMMW0:,:oKMMMMMMMx.                    .'oko,...                  .oNMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMNl                  .'.,d0o. ....                 ,KMMMMMMWx. ,OWMMMMMMMMMMMMMMMMMMMNl                             ..          .xWMMMMMMMx,.          :k;                               ;0MMMMMMMMMMMMMMMMMMMMMMMKc..kWMWNXNM0'            .,,.'c;;'  cKk:''.                 'OMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMWx.                ..,ckKd. .;cxocoddc;'.         cXX00KXXO;.:0MMMMMMMMMMMMMMMMMMMMMMXo.                          :l.          .kMMMMMMMMk;.          .OXl.                           .cKMMMMMMMMMMMMMMMMMMMMMMMMMNd..ckKK0kOx'        .ok0XNWKood;,.  :0Xd,..    ...         ;0MMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMk'.        ..'.   ..cXKc   .,.;:kNNMMWNO,        'ox0XX0l..lXMMMMMMMMMMMMMMMMMMMMMMMMWO;                       ,xKc           '0MMMMMMMMOc.           oWWO;.                       .;kWMMMMMMMMMMMMMMMMMMMMMMMMMMMWd.'OWMMNk;.       .dWMMNOdxc.  '.   ,k0;..  .;'.        ..;0MMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMx...         .:,....lk,    '.  .,,,oKWW0;       '.cXMMMWk'cXMMMMMMMMMMMMMMMMMMMMMMMMMMMNOc.                 .:kNMO.           ;KMMMMMMMM0o'           ;KMMNOc.                   'lONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNo:0MMMMKc:,       .xN0:.      ..    .d: ..,c.       ..   '0MMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMx.  ..        .c,. .l;    .'.       .oo'        ;cdWMMMWocKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXko;'.       .';lkXWMMNl            :NMMMMMMMMKd,           .xMMMMWKxc'.           .;lOXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXldWMMWKx:.         '.        ..     ,;   ;;         '.  ;KMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMO.  ..        .;.  .,.    ..                    .:kKNMMKlkMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNK0Okkkk0KNWMMMNOdc.            ;0WMMMMNOo:,.            .oXMMMMMMNKOxollllodk0XWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMOdKNKOx:.                ...  .      '.  .,        .'.  ;XMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMWx.  .'.       .'   '.        'll:,.....           'coxOdoNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMKc.                .oNMMXc                   ,OWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMKc,;''.           'llooxkKX0:        .'   ..     ....   .xWMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMX; ..  ....    .   ''        ,0MMWWNXKKOl.              .dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK;                   .OMMk.                    ,KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk'           ..:dKWMMMMMMMMXc        ';.       ...  ..  oWMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMNc  .'..         ';'        ;KMMMMMMMMMMWKxl;.    .,,',ckNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWd.                   .OMMk.                    .xMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN0kxkx, .;ld0NWMMMMMMMM                                                     //
//                                                                                                                                                                                                                                                                                                                    //
//                                                                                                                                                                                                                                                                                                                    //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract Echos is ERC721Creator {
    constructor() ERC721Creator("Neural Echos", "Echos") {}
}

// File: contracts/manifold/ERC721Creator.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x5133522ea5A0494EcB83F26311A095DDD7a9D4b6;
        (bool success, ) = 0x5133522ea5A0494EcB83F26311A095DDD7a9D4b6.delegatecall(abi.encodeWithSignature("initialize(string,string)", name, symbol));
        require(success, "Initialization failed");
    }
        
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
     function implementation() public view returns (address) {
        return _implementation();
    }

    function _implementation() internal override view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }    

}

// File: node_modules/@openzeppelin/contracts/proxy/Proxy.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

// File: node_modules/@openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: node_modules/@openzeppelin/contracts/utils/StorageSlot.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}