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ballot.sol

pragma solidity ^0.4.21;

contract Random {
    function random() external view returns (uint256) {
        return uint256(blockhash(block.number));
    }
}

contract Test {
    Random random;
    
    uint256 public savedRandom;

    constructor() {
        random = new Random();
    }
    
    function test() external {
        savedRandom = random.random();
    }
}