#include <bits/stdc++.h>

using namespace std;

char v[ 12345 ];

int nrcuv, nrlitere;

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

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

    cin.getline(v, 12345);

    for (int i = 0; i < strlen( v ); i++){

        if (isalpha(v[ i ]))
            ++nrlitere;

        if (isalpha(v[ i ]) == false){

            if (nrlitere == 0){
                while (isalpha(v[ i ]) == false)
                    ++i;
                ++nrlitere;
            }

            else{
                while (isalpha(v[ i ]) == false)
                    ++i;

                ++nrlitere;
                ++nrcuv;
            }
        }
    }

    cout << nrlitere / nrcuv;
}