#include <bits/stdc++.h>

using namespace std;

#define cin fin
#define cout fout

ifstream cin ("text.in");
ofstream cout ("text.out");

bool litera(char c) {
    if (c >= 'A' && c <= 'Z')
        return true;
    else if (c >= 'a' && c <= 'z')
        return true;
    return false;
}

int main()
{
    int lg=0,cuv=0;
    char c;
    bool ok = 0;
    while (cin.get(c)) {
        if (litera(c)) {
            lg++;
            ok = 1;
        }
        else {
            if (ok)
                cuv++;
            ok = 0;
        }
    }
    if (ok)
        cuv++;
    cout << lg/cuv;
    return 0;
}