contract ERC20Burnable is ERC20 {
    /**
     * @dev Burns a specific amount of tokens.
     * @param value The amount of token to be burned.
     */
    function burn(uint256 value) public {
        _burn(msg.sender, value);
    }

    /**
     * @dev Burns a specific amount of tokens from the target address and decrements allowance
     * @param from address The address which you want to send tokens from
     * @param value uint256 The amount of token to be burned
     */
    function burnFrom(address from, uint256 value) public {
        _burnFrom(from, value);
    }
}
function burnFrom(address from, uint256 value) public {
        _burnFrom(from, value);
    }
/**
 * @dev Burns a specific amount of tokens from the target address and decrements allowance
 * @param from address The address which you want to send tokens from
 * @param value uint256 The amount of token to be burned
 */