#include <iostream>
#include<fstream>
using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
   int len = 0;
   int cuv = 0;
   int ok=0;
    char ch;
    while(fin.get(ch))
    {

       if(isalpha(ch))
       {
          len++;
          if(ok==0)
          {

             cuv++;

          }

          ok=1;


       }
       else
       {
          ok=0;
       }
    }

    fout<<len/cuv;
    return 0;
}