use std::io;

fn main() {
    let mut buf = String::new();
    io::stdin().read_line(&mut buf).
        expect("Failed to read line");
    let a = get_num(buf.trim());
    buf.clear();
    io::stdin().read_line(&mut buf).
        expect("Failed to read line");
    let b = get_num(buf.trim());
    let mut n = b - a;
    if n < 0 {
        n += 4;
    }
    println!("{}", n)
}

fn get_num(s: &str) -> i32 {
    match s {
        "E" => 0,
        "S" => 1,
        "W" => 2,
        "N" => 3,
        _ => panic!("not support {}", s),
    }
}