contract C {
    function f() public {
        address addr;
        uint balance = addr.balance;
        bool callRet = addr.call("");
        bool delegatecallRet = addr.delegatecall("");
        bool sendRet = addr.send(1);
        addr.transfer(1);
        balance; callRet; delegatecallRet; sendRet;
    }
}
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