#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
using namespace std;
using ll = long long;
const double PI = 3.14159265358979323846;

int main() {
  string s;
  cin >> s;
  if(s == "SUN") cout << 7 << endl;
  else if(s == "MON") cout << 6 << endl;
  else if(s == "TUE") cout << 5 << endl;
  else if(s == "WED") cout << 4 << endl;
  else if(s == "THU") cout << 3 << endl;
  else if(s == "FRI") cout << 2 << endl;
  else if(s == "SAT") cout << 1 << endl;
  return 0;
}
/*
** author:mahmoud magdy
*/
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define endl "\n"

inline int D()
{
    int m ;
    cin>>m;
    return m ;
}
inline ll lD()
{
    ll m ;
    cin>>m;
    return m ;
}
inline double dD()
{
    double m;
    cin>>m;
    return m;
}
void fast()
{
    ios_base :: sync_with_stdio( 0 ) ;
    cin.tie( 0 ) ;
    cout.tie( 0 ) ;
}
int main()
{
    fast();
    string s[7]={"SUN","MON","TUE","WED","THU","FRI","SAT"};
    string s1;
    cin>>s1;
    int day;
    for(int i=0;i<7;i++){
        if(s[i]==s1){
            day=i+1;
            break;
        }
    }
    cout<<7-(day-1)<<endl;
}
