#include <bits/stdc++.h>

using namespace std;

char c;
long long n, k;
bool ok;

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");

    c = f.get();
    while(!f.eof()) {
        if(('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z') && !ok) {
            k ++;
            n ++;
            ok = true;
        }
        else if(('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z')) n ++;
        else ok = false;
        c = f.get();
    }
    g << n / k << "\n";
    return 0;
}