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contracts...MyContract.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract MyContract {
    string value;

    function get() public view returns (string memory) {
        return value;
    }
    
    function set(string memory _value) public {
        value = _value;
    }
}