#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

char lit;
long long nrl, nr, k;

int main () {
    while (fin.get(lit) && lit != EOF) {
        if (lit >= 'a' && lit <= 'z' || lit >= 'A' && lit <= 'Z') {
             nrl++;
           if(k==0)
           {
               nr++;
               k = 1;
           }
       }
       else k = 0;
   }
    fout << nrl / nr;
    return 0;
}