fn read() -> (usize, usize) {
    fn read_item() -> usize {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let c = buf.trim().parse().unwrap();
        "NESW".chars().position(|e| e == c).unwrap()
    }

    (read_item(), read_item())
}

fn solve(a: usize, b: usize) -> usize {
    (b + 4 - a) % 4
}

fn main() {
    let (a, b) = read();
    println!("{}", solve(a, b));
}