#include <iostream>
#include <iomanip>
#include <limits>
#include <string>
#include <fstream>
using namespace std;

int main() {
	ifstream fin("text.in");
	ofstream fout("text.out");

	char ch;
	int i = 0, let = 0, word = 0;
	while (cin >> ch){
		if (isalpha(ch))
			++let;
		if (k == 0) {
			cuv++;
			k = 1;
		}
		else
			k = 0;
	}
	cout << let / word;

	return 0;
}