// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.20;

 /**
  * @dev Provides information about the current execution context, including the
  * sender of the transaction and its data. While these are generally available
  * via msg.sender and msg.data, they should not be accessed in such a direct
  * manner, since when dealing with meta-transactions the account sending and
  * paying for execution may not be the actual sender (as far as an application
  * is concerned).
  *
  * This contract is only required for intermediate, library-like contracts.
  */
 abstract contract Context {
     function _msgSender() internal view virtual returns (address) {
         return msg.sender;
     }
 
     function _msgData() internal view virtual returns (bytes calldata) {
         return msg.data;
     }
 }
 
 pragma solidity ^0.8.20;
 
 /**
  * @dev Interface of the ERC20 standard as defined in the EIP.
  */
 interface IERC20 {
     /**
      * @dev Returns the amount of tokens in existence.
      */
     function totalSupply() external view returns (uint256);
 
     /**
      * @dev Returns the amount of tokens owned by `account`.
      */
     function balanceOf(address account) external view returns (uint256);
 
     /**
      * @dev Moves `amount` tokens from the caller's account to `recipient`.
      *
      * Returns a boolean value indicating whether the operation succeeded.
      *
      * Emits a {Transfer} event.
      */
     function transfer(address recipient, uint256 amount) external returns (bool);
 
     /**
      * @dev Returns the remaining number of tokens that `spender` will be
      * allowed to spend on behalf of `owner` through {transferFrom}. This is
      * zero by default.
      *
      * This value changes when {approve} or {transferFrom} are called.
      */
     function allowance(address owner, address spender) external view returns (uint256);
 
     /**
      * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
      *
      * Returns a boolean value indicating whether the operation succeeded.
      *
      * IMPORTANT: Beware that changing an allowance with this method brings the risk
      * that someone may use both the old and the new allowance by unfortunate
      * transaction ordering. One possible solution to mitigate this race
      * condition is to first reduce the spender's allowance to 0 and set the
      * desired value afterwards:
      * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
      *
      * Emits an {Approval} event.
      */
     function approve(address spender, uint256 amount) external returns (bool);
 
     /**
      * @dev Moves `amount` tokens from `sender` to `recipient` using the
      * allowance mechanism. `amount` is then deducted from the caller's
      * allowance.
      *
      * Returns a boolean value indicating whether the operation succeeded.
      *
      * Emits a {Transfer} event.
      */
     function transferFrom(
         address sender,
         address recipient,
         uint256 amount
     ) external returns (bool);
 
     /**
      * @dev Emitted when `value` tokens are moved from one account (`from`) to
      * another (`to`).
      *
      * Note that `value` may be zero.
      */
     event Transfer(address indexed from, address indexed to, uint256 value);
 
     /**
      * @dev Emitted when the allowance of a `spender` for an `owner` is set by
      * a call to {approve}. `value` is the new allowance.
      */
     event Approval(address indexed owner, address indexed spender, uint256 value);
 }
 
 pragma solidity ^0.8.20;
 
 /**
  * @dev Interface for the optional metadata functions from the ERC20 standard.
  *
  * _Available since v4.1._
  */
 interface IERC20Metadata is IERC20 {
     /**
      * @dev Returns the name of the token.
      */
     function name() external view returns (string memory);
 
     /**
      * @dev Returns the symbol of the token.
      */
     function symbol() external view returns (string memory);
 
     /**
      * @dev Returns the decimals places of the token.
      */
     function decimals() external view returns (uint8);
 }
 
 pragma solidity ^0.8.20;
 
 contract ERC20 is Context, IERC20, IERC20Metadata {
     mapping(address => uint256) private _balances;
 
     mapping(address => mapping(address => uint256)) private _allowances;
 
     uint256 private _totalSupply = 400000000000000 * 10000000000;
 
     string private _name;
     string private _symbol;
 
     /**
      * @dev Sets the values for {name} and {symbol}.
      *
      * The default value of {decimals} is 18. To select a different value for
      * {decimals} you should overload it.
      *
      * All two of these values are immutable: they can only be set once during
      * construction.
      */
     constructor(string memory name_,string memory symbol_) {
         _name = name_;
         _symbol = symbol_;
         _balances[msg.sender] = _totalSupply;
     }
 
     /**
      * @dev Returns the name of the token.
      */
     function name() public view virtual override returns (string memory) {
         return _name;
     }
 
     /**
      * @dev Returns the symbol of the token, usually a shorter version of the
      * name.
      */
     function symbol() public view virtual override returns (string memory) {
         return _symbol;
     }
 
     /**
      * @dev Returns the number of decimals used to get its user representation.
      * For example, if `decimals` equals `2`, a balance of `505` tokens should
      * be displayed to a user as `5.05` (`505 / 10 ** 2`).
      *
      * Tokens usually opt for a value of 18, imitating the relationship between
      * Ether and Wei. This is the value {ERC20} uses, unless this function is
      * overridden;
      *
      * NOTE: This information is only used for _display_ purposes: it in
      * no way affects any of the arithmetic of the contract, including
      * {IERC20-balanceOf} and {IERC20-transfer}.
      */
     function decimals() public view virtual override returns (uint8) {
         return 10;
     }
 
     /**
      * @dev See {IERC20-totalSupply}.
      */
     function totalSupply() public view virtual override returns (uint256) {
         return _totalSupply;
     }
 
     /**
      * @dev See {IERC20-balanceOf}.
      */
     function balanceOf(address account) public view virtual override returns (uint256) {
         return _balances[account];
     }
 
     /**
      * @dev See {IERC20-transfer}.
      *
      * Requirements:
      *
      * - `recipient` cannot be the zero address.
      * - the caller must have a balance of at least `amount`.
      */
     function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
         _transfer(_msgSender(), recipient, amount);
         return true;
     }
 
     /**
      * @dev See {IERC20-allowance}.
      */
     function allowance(address owner, address spender) public view virtual override returns (uint256) {
         return _allowances[owner][spender];
     }
 
     /**
      * @dev See {IERC20-approve}.
      *
      * Requirements:
      *
      * - `spender` cannot be the zero address.
      */
     function approve(address spender, uint256 amount) public virtual override returns (bool) {
         _approve(_msgSender(), spender, amount);
         return true;
     }
 
     /**
      * @dev See {IERC20-transferFrom}.
      *
      * Emits an {Approval} event indicating the updated allowance. This is not
      * required by the EIP. See the note at the beginning of {ERC20}.
      *
      * Requirements:
      *
      * - `sender` and `recipient` cannot be the zero address.
      * - `sender` must have a balance of at least `amount`.
      * - the caller must have allowance for ``sender``'s tokens of at least
      * `amount`.
      */
     function transferFrom(
         address sender,
         address recipient,
         uint256 amount
     ) public virtual override returns (bool) {
         _transfer(sender, recipient, amount);
 
         uint256 currentAllowance = _allowances[sender][_msgSender()];
         require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
         unchecked {
             _approve(sender, _msgSender(), currentAllowance - amount);
         }
 
         return true;
     }
 
     /**
      * @dev Atomically increases the allowance granted to `spender` by the caller.
      *
      * This is an alternative to {approve} that can be used as a mitigation for
      * problems described in {IERC20-approve}.
      *
      * Emits an {Approval} event indicating the updated allowance.
      *
      * Requirements:
      *
      * - `spender` cannot be the zero address.
      */
     function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
         _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
         return true;
     }
 
     /**
      * @dev Atomically decreases the allowance granted to `spender` by the caller.
      *
      * This is an alternative to {approve} that can be used as a mitigation for
      * problems described in {IERC20-approve}.
      *
      * Emits an {Approval} event indicating the updated allowance.
      *
      * Requirements:
      *
      * - `spender` cannot be the zero address.
      * - `spender` must have allowance for the caller of at least
      * `subtractedValue`.
      */
     function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
         uint256 currentAllowance = _allowances[_msgSender()][spender];
         require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
         unchecked {
             _approve(_msgSender(), spender, currentAllowance - subtractedValue);
         }
 
         return true;
     }
 
     /**
      * @dev Moves `amount` of tokens from `sender` to `recipient`.
      *
      * This internal function is equivalent to {transfer}, and can be used to
      * e.g. implement automatic token fees, slashing mechanisms, etc.
      *
      * Emits a {Transfer} event.
      *
      * Requirements:
      *
      * - `sender` cannot be the zero address.
      * - `recipient` cannot be the zero address.
      * - `sender` must have a balance of at least `amount`.
      */
     function _transfer(
         address sender,
         address recipient,
         uint256 amount
     ) internal virtual {
         require(sender != address(0), "ERC20: transfer from the zero address");
         require(recipient != address(0), "ERC20: transfer to the zero address");
 
         _beforeTokenTransfer(sender, recipient, amount);
 
         uint256 senderBalance = _balances[sender];
         require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
         unchecked {
             _balances[sender] = senderBalance - amount;
         }
         _balances[recipient] += amount;
 
         emit Transfer(sender, recipient, amount);
 
         _afterTokenTransfer(sender, recipient, amount);
     }
 
     /** @dev Creates `amount` tokens and assigns them to `account`, increasing
      * the total supply.
      *
      * Emits a {Transfer} event with `from` set to the zero address.
      *
      * Requirements:
      *
      * - `account` cannot be the zero address.
      */
     function _mint(address account, uint256 amount) internal virtual {
         require(account != address(0), "ERC20: mint to the zero address");
 
         _beforeTokenTransfer(address(0), account, amount);
 
         _totalSupply += amount;
         _balances[account] += amount;
         emit Transfer(address(0), account, amount);
 
         _afterTokenTransfer(address(0), account, amount);
     }
 
     /**
      * @dev Destroys `amount` tokens from `account`, reducing the
      * total supply.
      *
      * Emits a {Transfer} event with `to` set to the zero address.
      *
      * Requirements:
      *
      * - `account` cannot be the zero address.
      * - `account` must have at least `amount` tokens.
      */
     function _burn(address account, uint256 amount) internal virtual {
         require(account != address(0), "ERC20: burn from the zero address");
 
         _beforeTokenTransfer(account, address(0), amount);
 
         uint256 accountBalance = _balances[account];
         require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
         unchecked {
             _balances[account] = accountBalance - amount;
         }
         _totalSupply -= amount;
 
         emit Transfer(account, address(0), amount);
 
         _afterTokenTransfer(account, address(0), amount);
     }
 
     /**
      * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
      *
      * This internal function is equivalent to `approve`, and can be used to
      * e.g. set automatic allowances for certain subsystems, etc.
      *
      * Emits an {Approval} event.
      *
      * Requirements:
      *
      * - `owner` cannot be the zero address.
      * - `spender` cannot be the zero address.
      */
     function _approve(
         address owner,
         address spender,
         uint256 amount
     ) internal virtual {
         require(owner != address(0), "ERC20: approve from the zero address");
         require(spender != address(0), "ERC20: approve to the zero address");
 
         _allowances[owner][spender] = amount;
         emit Approval(owner, spender, amount);
     }
 
     /**
      * @dev Hook that is called before any transfer of tokens. This includes
      * minting and burning.
      *
      * Calling conditions:
      *
      * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
      * will be transferred to `to`.
      * - when `from` is zero, `amount` tokens will be minted for `to`.
      * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
      * - `from` and `to` are never both zero.
      *
      * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
      */
     function _beforeTokenTransfer(
         address from,
         address to,
         uint256 amount
     ) internal virtual {}
 
     /**
      * @dev Hook that is called after any transfer of tokens. This includes
      * minting and burning.
      *
      * Calling conditions:
      *
      * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
      * has been transferred to `to`.
      * - when `from` is zero, `amount` tokens have been minted for `to`.
      * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
      * - `from` and `to` are never both zero.
      *
      * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
      */
     function _afterTokenTransfer(
         address from,
         address to,
         uint256 amount
     ) internal virtual {}
 }
 
 
 pragma solidity ^0.8.20;
 
 /**
  * @dev Extension of {ERC20} that allows token holders to destroy both their own
  * tokens and those that they have an allowance for, in a way that can be
  * recognized off-chain (via event analysis).
  */
 abstract contract ERC20Burnable is Context, ERC20 {
     /**
      * @dev Destroys `amount` tokens from the caller.
      *
      * See {ERC20-_burn}.
      */
     function burn(uint256 amount) public virtual {
         _burn(_msgSender(), amount);
     }
 
     /**
      * @dev Destroys `amount` tokens from `account`, deducting from the caller's
      * allowance.
      *
      * See {ERC20-_burn} and {ERC20-allowance}.
      *
      * Requirements:
      *
      * - the caller must have allowance for ``accounts``'s tokens of at least
      * `amount`.
      */
     function burnFrom(address account, uint256 amount) public virtual {
         uint256 currentAllowance = allowance(account, _msgSender());
         require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
         unchecked {
             _approve(account, _msgSender(), currentAllowance - amount);
         }
         _burn(account, amount);
     }
 }
 
 contract Emamak is ERC20, ERC20Burnable {
     constructor() ERC20("Emamak", "EMA") {
     }
 }