use std::io::{stdin, Read};

fn main() {
	let mut s = String::new();
	stdin().read_to_string(&mut s).ok();
	let mut s = s.lines();
	let p = s.next().unwrap();
	println!(
		"{}",
		if s.flat_map(str::chars).filter(|&c| c != '.').count() % 2 == 0 {
			p.to_owned()
		} else {
			"odayukiko".replace(p, "")
		}
	);
}