#include <bits/stdc++.h>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char c, last;
long long cuv, lit, medie;
int main() {
    fin.get(last);
    if (isalpha(last))
        lit ++, cuv ++;
    while (fin.get(c)){
      if (isalpha(c) && !isalpha(last))
          cuv ++;
      if (isalpha(c))
          lit ++;
      last = c;
    }
    medie = lit / cuv;
    fout << medie << '\n';  
    return 0;
}