#include <bits/stdc++.h>

using namespace std;

int nrcuv, nrlitere;
bool gut = 0;
char x;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    ifstream cin("text.in");
    ofstream cout("text.out");

    while (cin.get( x )){
        if (isalpha(x)){
            ++nrlitere;

            if (gut == 1)
                gut = 0, ++nrcuv;
        }
        else
            gut = 1;
    }

    cout << nrlitere / nrcuv;
}