function Main(input) {
    let src = input.replace("\n", "").split(" ");
    let a = parseInt(src[0]) * 1000;
    let b = parseInt(src[1]) * 3600;
    console.log(a == b ? "same" : a > b ? "KoD" : "blackyuki");
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));