#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < n; i++)
#define srep(i,a,b) for(int i = a; i < b; i++)
#define all(A) (A).begin(),A.end()
#define MOD 1000000007
using namespace std;
using ll = long long;
using P = pair<char,int>;
using Graph = vector<vector<int>>;

int ch_int(char x){
	if(x == 'N') return 0;
	else if(x == 'E') return 1;
	else if(x == 'S') return 2;
	else return 3;
}

int main(void){
	char a,b; cin >> a >> b;
	cout << (ch_int(b)-ch_int(a)+4)%4;
}