pragma solidity^0.4.19;
// like a less-liquid GasToken
contract Sponsored {
    uint256[] wastedSpace;
    function sponsor() external {
        wastedSpace.push(1);
        wastedSpace.push(1);
        wastedSpace.push(1);
        wastedSpace.push(1);
        wastedSpace.push(1);
    }
    modifier sponsored {
        _;
        if (wastedSpace.length != 0) {
            wastedSpace.pop();
            wastedSpace.pop();
            wastedSpace.pop();
            wastedSpace.pop();
            wastedSpace.pop();
        }
    }
}