#include <cstdio>
#include <cctype>
int main () {
	int cl=0,ccv=0,lc=0;
	char el;
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	for(;scanf("%c",&el)!=-1;){
		if(isalpha(el)){
			++cl;
			++lc;
		}
		else {
			if(lc>0)++ccv;
			lc=0;
		}
	}
	printf("%d",cl/ccv);
	return 0;
}