fn read() -> i8 {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim();
    match s {
        "N" => 0,
        "E" => 1,
        "S" => 2,
        "W" => 3,
        _ => unreachable!(),
    }
}

fn main() {
    let a = read();
    let b = read();

    println!("{}",(4 + b - a) % 4);
}