#include <iostream>
#include <fstream>
#include <cstdio>
using namespace std;
#define infile "text.in"
#define outfile
int main()
{
    /*ifstream f (infile);*/
    ofstream g("text.out");
    char c;
    bool start_word;
    unsigned long long wCount=0, cCount=0;
    FILE* inFile=fopen (infile,"r");
    do
    {
        c = fgetc(inFile);
        if (!start_word)
        {
             if (isalpha(c))
             {
                wCount++;
                cCount++;
                start_word = true;
             }
        }
        else
        {

            if (!isalpha(c)) start_word=false;
            else{
                cCount++;

            }
        }

    } while (c != EOF);

    g<<cCount/wCount;
    return 0;
}