#include <fstream>
#include <iostream>
#include <sstream>

using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
inline bool litera(char c) {
  return ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
}
int main() {
  int k = 0, len = 0, cuv = 0;
  char c;
  while (fin >> noskipws >> c) {
    if (litera(c)) {
      len++;
      if (k == 0)
        cuv++;
      k = 1;
    } else
      k = 0;
  }
  int sol = len / cuv;
  fout << sol;
  fin.close();
  fout.close();
  return 0;
}