use std::io::*;
use std::str::FromStr;

#[allow(dead_code)]
fn get_line() -> String {
    let stdin = stdin();
    let mut line = String::new();
    stdin.lock().read_line(&mut line).expect("io error.");
    line.trim().to_string()
}

#[allow(dead_code)]
fn cast<T: FromStr>(s: &str) -> T {
    s.parse().ok().expect("parse error.")
}

#[allow(dead_code)]
fn get_word<T: FromStr>() -> T {
    cast(&get_line())
}

#[allow(dead_code)]
fn get_vec<T: FromStr>() -> Vec<T> {
    (&get_line()).split(' ').map(cast::<T>).collect()
}



/* ---------- ここまでテンプレ ---------- */


fn main() {
    let s = get_line();

    let mut cnt: usize = 0;
    for _ in 0..8 {
        cnt += get_line().chars().filter(|&c| c != '.').count();
    }

    if cnt % 2 == 0 {
        println!("{}", s);
    } else {
        println!("{}",
            if s == String::from("oda") {"yukiko"}
            else {"oda"}
        );
    }
}