#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
using namespace std;

main() {
    ifstream cin("text.in");
    ofstream cout("text.out");
    string s;
    while (!cin.eof()) {
        string ss;
        getline(cin, ss);
        s += " " + ss;
    }
    int n = 0, k = 0;
    for (int i = 1; i < s.size(); i++) {
        if (isalpha(s[i])) {
            n++;
        } else if (isalpha(s[i-1])) {
            k++;
        }
    }
    cout<<n/k;
}