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

using namespace std;

int trim(string s)
{
  int words = 0, letters = 0;
  bool ok = 0;

  for (int i = 0; i < s.size(); i++)
  {
      if (isalpha(s[i]))
      {
          letters++;
          ok = true;
      }
      else if (ok == true)
      {
          words++;
          ok = false;
      }
  }
  return letters / words;
}

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");

    string line;
    string content;

    while (getline(f, line) != NULL)
        content.append(line);

    g<<trim(content);
    return 0;
}