contract.sol

contract mortal {
    address owner;

    function mortal() {
        owner = msg.sender;
    }

    function kill() {
        if (msg.sender == owner) selfdestruct(owner);
    }
}

contract greeter is mortal {
    string greeting;

    function greeter(string _greeting) public {
        greeting = _greeting;
    }

    function greet() constant returns(string) {
        return greeting;
    }
}