#include <bits/stdc++.h>
using namespace std;
 
ifstream fin ("text.in");
ofstream fout("text.out");

bool is_letter(char a) {
    return ((a >= 'a' && a <= 'z') || (a >= 'A' && a <= 'Z'));
}

int main() {
    char a;
    int t = 0, nr = 0;
    bool last = 0;
    while(fin.get(a)) {
        if(is_letter(a)) {
            t++;
            if(!last) {
                last = 1;
                nr++;
            }
        } else last = 0;
    }
    fout << t / nr << '\n';
}