#include <fstream>
using namespace std;

char ch;
int W, L;

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

bool CheckLetter(char c) {
	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}

int main() {
	while (fin.get(ch)) {
		if (CheckLetter(ch)) {
			++W;
			while (CheckLetter(ch)) {
				++L;
				fin.get(ch);
			}
		}
	}
	fout << L / W << "\n";
	return 0;
}