#include <iostream>
#include <fstream>
#include <string>

bool is_alphabetic(char c) {
  return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}

int main() {
  std::ifstream in("text.in");
  std::ofstream out("text.out");
  std::string str;

  std::getline(in, str);

  int words = is_alphabetic(str[0]), len = is_alphabetic(str[0]);

  for (int i = 1; i < str.size(); ++i) {
    if (is_alphabetic(str[i])) {
      len++;
      if (!is_alphabetic(str[i - 1]))
        ++words;
    }
  }

  out << len / words << '\n';

  out.close();
  return 0;
}