fn main() {
    let mut input = String::new();
    std::io::stdin().read_line(&mut input).unwrap();
    let mut iter = input.split_whitespace();
    let a: f64 = iter.next().unwrap().parse().unwrap();
    let b: f64 = iter.next().unwrap().parse().unwrap();
    let a_per_second = a * 1000.0 / 60.0 / 60.0;

    if a_per_second < b {
        println!("blackyuki");
    } else if b < a_per_second {
        println!("KoD");
    } else {
        println!("same");
    }
}