#include<stdio.h>
using namespace std;
int main() {
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char x,y='a';
	int countwords=0,length=0;
	if(scanf("%c",&x)==EOF) printf("0");
	else {
		if((x>='a' && x<='z') || (x>='A' && x<='Z')) {
			length++;
			countwords++;
		}
		while(scanf("%c",&y)!=EOF) {
			if((y>='a' && y<='z') || (y>='A' && y<='Z')) {
				length++;
				if(!((x>='a' && x<='z') || (x>='A' && x<='Z')))
					countwords++;
			}
			x=y;
		}
		printf("%d",length/countwords);
	}
	return 0;
}