#include <fstream>
#include <cstring>

using namespace std;

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

#define DIM 2000000

char ch, a;

int main() {
  int nrlit = 0, nrcuv = 0;
  while(fin.get(ch)) {
    if(isalpha(ch))      //daca incepe un cuvant;
      nrlit++;
    else if(isalpha(a))
      nrcuv++;
    a = ch;
    fin.get(ch);
  }

  if(nrcuv == 0)
    fout << 0;
  else fout << nrlit / nrcuv;

  return 0;
}