/*******************************************************************************************
*           .--.																		   *
* ::\`--._,'.::.`._.--'/::			@author Ana M. Mihut	@course InfoArena Tryout	   *
* ::::. `  __::__ ' .:::::			@alias  LT-Kerrigan		@date   19.07.2014			   *
* ::::::-:.`'..`'.:-::::::			@link   http://infoarena.ro/problema/text		       *
* ::::::::\ `--' /::::::::			@detail "Use regex" they said "It'll be fun" they said *
*																						   *
********************************************************************************************/
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <sstream>
#include <string>
#include <string.h>

using namespace std;

bool is_letter(char c) { return c >= 65 && c <= 90 || c >= 97 && c <= 122; }

int count_words(const string& s) {
	int i = 0, N = s.size(), count = 0, letterCount = 0;
	while (i < N) {
		while (i < N && !is_letter(s[i])) i++;
		if (i == N) break;
		while (i < N && is_letter(s[i])) {
			i++;
			letterCount++;
		}
		count++;
	}
	//printf("%d\n", letterCount);
	//return count;
	return letterCount / count;
}

int main(){
	freopen("text.in", "r", stdin);
	freopen("text.out", "w", stdout);
	std::ifstream file("text.in");
	std::string s;
	std::getline(file, s);
	printf("%d\n", count_words(s));
	return 0;
}