#include <iostream>
#include <fstream>
using namespace std;

ifstream in("text.in");
ofstream out("text.out");

int no, words;
char c;

int main()
{
	while (in.get(c)) {
		if (isalpha(c)) {
			words++;
			while (isalpha(c)) {
				no++;
				in.get(c);
			}
		}
	}

	out << no / words << '\n';

	in.close();
	out.close();
	return 0;
}