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

signed main()
{
   unordered_map<char,char>m;
   char f,s;
   cin >> f ;
   cin >> s;
   int ans =0 ;
   m['S']= 'W';
   m['E']='S';
   m['W']='N';
   m['N']='E';
   while(f != s)
   {
      // cout << 1 << endl;
      f= m[f];
      ans++;
   }
   cout << ans << '\n';
   return 0;
}