#include <fstream>

using namespace std;

char c;
int l, cuvinte;
bool cuvant;

int main () {
  ifstream fi("text.in");
  ofstream fo("text.out");
  while (fi.get(c)) {
    if ((('a' <= c) and (c <= 'z')) or (('A' <= c) and (c <= 'Z')))
      l++, cuvant = true;
    else
      if (cuvant)
        cuvant = false, cuvinte++;
  }
  fo << l/cuvinte;
  return 0;
}