#include <bits/stdc++.h>
using namespace std;
 ifstream fin ("text.in");
 ofstream fout("text.out");

int main()
{



    char c;
    int ok = 0;
    int nrcuv = 0, nrl = 0;
while(fin.get(c))
 {

     if(isalpha(c))
     {
         if(ok == 1)
         {
             nrcuv++;
             ok = 0;
         }
         nrl++;

     }
     else
        ok = 1;


 }


 fout << nrl / nrcuv ;
 fout.close();
    return 0;
}