#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
  int cuvinte = 0, litere = 0, contor = 0;
  char l;
  while(fin.get(l))
  {
    if(isalpha(l))
    {
      ++litere;
      ++contor;
    }
    else
    {
      if(litere != 0)
      {
        litere = 0;
        ++cuvinte;
      }
    }
  }
  fout << contor / cuvinte;




return 0;
}