// USING C++
#include<bits/stdc++.h>
using namespace std;
int main(){
    string t,s="ESWN";
    char c1,c2;cin >> c1 >> c2;
    int idx1,idx2;
    for(int i=0;i<4;i++){
        if(c1==s[i])idx1=i;
        if(c2==s[i])idx2=i;
    }
    cout << abs(idx1-idx2);
}