// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

contract MOTHER {
    string public name = "MOTHER";  
    string public symbol = "MOTHER";
    uint8 public decimals = 18; 
    uint256 public totalSupply = 51400000000 * 10**decimals;  
    
    address public owner;
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;
    
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    
    modifier onlyOwner() {
        require(msg.sender == owner, "Not the owner");
        _;
    }
    
    constructor() {
        balanceOf[msg.sender] = totalSupply;
        owner = msg.sender;
    }  
    
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "Invalid address");
        owner = newOwner;
    }   
    
    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value, "Not enough balance");
        require(balanceOf[_to] + _value >= balanceOf[_to], "Overflow");
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= balanceOf[_from], "Not enough balance");
        require(_value <= allowance[_from][msg.sender], "Not approved");
        balanceOf[_from] -= _value;
        balanceOf[_to] += _value;
        allowance[_from][msg.sender] -= _value;
        emit Transfer(_from, _to, _value);
        return true;
    }
    // Approx 1000 lines
}