function Main(input) {
    input = input.split("\n").map(i => parseInt(i, 10));

    const limit = input.pop();
    
    const result = (input[4] - input[0] > limit) ?  'Yay!' : 'Yay!' ;
    console.log(result);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));