fn main() {
    let mut input = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut input).ok();
    let input: Vec<String> = input
        .split('\n')
        .map(std::string::ToString::to_string)
        .collect();

    let n_placed = input[1..]
        .iter()
        .flat_map(|s| s.chars())
        .filter(|&c| c != '.')
        .count();

    match (&input[0], n_placed % 2) {
        (p, 0) if p == "oda" => println!("oda"),
        (p, 1) if p == "yukiko" => println!("oda"),
        _ => println!("yukiko"),
    };
}