use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).unwrap();
	let c: Vec<char> = s.split_whitespace().flat_map(str::parse).collect();
	let d = ['E', 'S', 'W', 'N'];
	let t = d.iter().position(|&d| d == c[1]).unwrap() + 4;
	let b = d.iter().position(|&d| d == c[0]).unwrap();
	println!("{}", (t - b) % 4);
}