//pragma solidity ^0.4.24;


contract A {

    address constant public MY_ADDRESS = 0xE0f5206BBD039e7b0592d8918820024e2a7437b9;
    address public myFriendsAddress = 0xc0ffee254729296a45a3885639AC7E10F9d54979;

    uint public used;
    uint public test = 5;

    uint constant X = 32**22 + 8;
    string constant TEXT1 = "abc";
    string text2 = "xyz";

    function setUsed() public {
        if (msg.sender == MY_ADDRESS) {
            used = test;
        }
    }
}


contract B is A {

    address public mySistersAddress = 0x999999cf1046e68e36E1aA2E0E07105eDDD1f08E;

    function () external {
        used = 0;
    }

    function setUsed(uint a) public {
        if (msg.sender == MY_ADDRESS) {
            used = a;
        }
    }
}