#include <algorithm>
#include <iostream>
#include <string>

std::size_t a_counter(const std::string& str) {
  std::size_t n = 0;
  for (auto c : str) {
    if (c == 'a' || c == 'A') {
      ++n;
    }
  }
  return n;
}

int main() {
  std::string str;
  std::size_t now = 0;
  std::size_t nol = 0;
  std::size_t noa = 0;
  std::size_t noa2 = 0;
  while (std::cin >> str) {
    ++now;
    nol += str.size();
    noa += a_counter(str);
    noa2 += std::count_if(std::begin(str),
			  std::end(str),
			  [](auto c){ return c == 'a' || c == 'A'; });
  }
  std::cout << "Liczba slow: " << now << std::endl;
  std::cout << "Liczba znakow: " << nol << std::endl;
  std::cout << "Srednia dlugosc slowa: "
	    << static_cast<double>(nol) / now << std::endl;
  std::cout << "Liczba liter a/A: " << noa << std::endl;
  std::cout << "Liczba liter a/A: " << noa2 << std::endl;
}