#include <bits/stdc++.h>
using namespace std;

int main(){
    ifstream cin("text.in");
    ofstream cout("text.out");
    string s, g;
    getline(cin, s);
    int t = 0, c = 0;
    for(int i = 0; s[i]; ++i){
        if(isalpha(s[i])){
        while(i < s.length() && isalpha(s[i]))
            g += s[i], ++i, ++t;
        ++c;
        }
    }
    cout << t / c << '\n';
    cin.close(), cout.close();
}