fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim().chars().nth(0).unwrap();
    let mut t = String::new();
    std::io::stdin().read_line(&mut t).ok();
    let t = t.trim().chars().nth(0).unwrap();

    let getval = |c: char| { if c == 'E' { 0 } else if c == 'W' { 2 } else if c == 'S' { 1 } else { 3 } };
    println!("{}", (4+getval(t)-getval(s))%4);
}