#include <iostream>
#include <string>
#include <cctype>
using namespace std;

int main(){
	string str;
	freopen("text.in", "r", stdin);
	freopen("text.out", "w", stdout);
	std::getline(std::cin, str);
	int len = str.size(), letters = 0, words = 0, k = 0;
	for(int i = 0; i < len; i++){
		if(isalpha(str[i])){
			if(k == 0){
				words++;
				k = 1;
			}
			letters++;
		}else{
			k = 0;
		}
	}
	if(words == 0)
		printf("0\n");
	else
		printf("%d\n", letters/words);
	return 0;
}
// 4746746547