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

int main() {
    char a, b;
    cin >> a >> b;
    vector<char> v = {'N', 'E', 'S', 'W'};
    int aa, bb;
    for(int i=0;i<4;i++) {
        if(v[i] == a) aa = i;
        if(v[i] == b) bb = i;
    }
    int cc = bb - aa;
    if(cc < 0) cc += 4;

    cout << cc << '\n';
}