#include <bits/stdc++.h>

using namespace std;

char ch;

int words,no;

int main()
{
    ifstream fin ("text.in");
    ofstream fout ("text.out");
    while (fin>>ch)
    {
        if (isalpha(ch))
        {
            words++;
            while (isalpha(ch))
            {
                no++;
                fin>>ch;
            }
        }
    }
    fout<<no/words<<"\n";
    return 0;
}