use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        a: char,
        b: char,
    }

    println!("{}", output(solve(a, b)));
}

fn solve(a: char, b: char) -> u8 {
    fn convert(x: char) -> u8 {
        match x {
            'N' => 0,
            'E' => 1,
            'S' => 2,
            'W' => 3,
            _ => unreachable!(),
        }
    }
    
    (4 + convert(b) - convert(a)) & 3
}

fn output(ans: u8) -> u8 {
    ans
}