#include <iostream>
#include <map>
using namespace std;

int main(void){
    char A,B;
    cin>>A>>B;
    map<char,int> mp;
    mp['N']=0;mp['E']=1;mp['S']=2;mp['W']=3;
    int ans=(mp[B]-mp[A]+4)%4;
    cout<<ans<<endl;
}