#include <cstdio>
#include <cctype>

using namespace std;

int main() {
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);

    int nr, sum;
    char ch;
    bool newWord;

    nr = sum = 0;
    do {
        ch = getchar();
        if(isalpha(ch)) {
            sum++;
            if(newWord) {
                nr++;
                newWord = 0;
            }
        }
        else {
            newWord = 1;
        }
    } while(ch != EOF);

    printf("%d\n", sum / nr);
    return 0;
}