#include <iostream>
#include <bits/stdc++.h>


using namespace std;

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



int main()
{
    char ch;
    int litera = 0, cuvant = 0,ok=1;
    while (f >> noskipws >> ch)
    {
        if(isalpha(ch))
            {
                litera++;
                ok=0;
            }
        else if(ok==0)
        {
            cuvant++;
            ok=1;
            //cout<<litera<<' '<<cuvant<<'\n';
        }
    }
    ///cout<<cuvant;
    g<<litera/cuvant;

}