#include"bits/stdc++.h"
using namespace std;

int main(void)
{
    char A,B;
    cin >> A >> B;
    map<char,int>d{
        {'N',0},
        {'W',1},
        {'S',2},
        {'E',3},
    };
    cout << abs((d.at(A) - d.at(B)) % 4) << endl;;
    return (0);
}