const SCALE: [&str; 12] = [
    "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B",
];

fn read() -> usize {
    let mut buf = String::new();
    std::io::stdin().read_line(&mut buf).unwrap();
    let c = buf.trim();
    SCALE.iter().position(|&e| e == c).unwrap()
}

fn solve(sn: usize) -> &'static str {
    SCALE.iter().cycle().nth(sn + 1).unwrap()
}

fn main() {
    println!("{}", solve(read()));
}