#include <bits/stdc++.h>

using namespace std;

int main()
{
    ifstream fin("text.in");
    ofstream fout("text.out");
    int cuv = 0,cif = 0;
    char ch;
    bool ok = 0;
    while (fin.get(ch)) {
        if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
            cif++;
            ok = 1;
        }
        else {
            if (ok == 1)
                cuv++;
            ok = 0;
        }
    }
    fout << cif / cuv;
    return 0;
}