#include <cstdio>
using namespace std;

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

    char a = ' ';
    char c;

    int l = 0, w = 0;
    
    while(scanf("%c", &c) != EOF ) {
        if(c >= 'a' && c <= 'z') {
            c -= 'a' - 'A';
        }
        if(c >= 'A' && c <= 'Z') {
            l++;
            if(a < 'A' || a > 'Z') {
                w++;
            }
        }
        a = c;
    }
    printf("%d", l / w);
    return 0;
}