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

int size(string s) {
	int i;
	for (i = 0; s[i] != '\0'; ++i){}
	return i;
}

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

	string s;
	getline(fin, s);
	int let = 0, i, wor = 0;
	for (i = 0; i < size(s); ++i) {
		if (isalpha(s[i]))
			let++;
		if (isalpha(s[i]) && !isalpha(s[i + 1]))
			wor++;
	}
	if (wor != 0)
		fout << let / wor;
	else
		fout << 0;
	return 0;
}