#include <bits/stdc++.h>

using namespace std;

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

char c;

int N, i;

long long litere, cuvinte;

bool ok=false;

int main()
{
    while(f.get(c))
    {
        if(isalpha(c))
        {
            litere++;
            ok=true;
        }
        else if(ok==true)
        {
            cuvinte++;
            ok=false;
        }
    }

    g<<(long long) litere/cuvinte<<'\n';

    return 0;
}