use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let mut itr = s.trim().split_whitespace();
	let a:u64 = itr.next().unwrap().parse().unwrap();
	let b:u64 = itr.next().unwrap().parse().unwrap();
	let ap = a * 1000;
	let bp = b * 3600;

	if ap > bp {
		println!("KoD");
	} else if ap < bp {
		println!("blackyuki");
	} else {
		println!("same");
	}
}