fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let mut s = s.trim().chars().collect::<Vec<char>>();
    s.sort();
    let mut v = "kyoprotenkei90".chars().collect::<Vec<char>>();
    v.sort();

    println!("{}", if s == v { "Yes" } else { "No" });
}