fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	println!(
		"{}",
		match n[1] * 36 / 10 {
			x if x < n[0] => "KoD",
			x if x > n[0] => "blackyuki",
			_ => "same",
		}
	)
}