#include <iostream>
#include <string.h>
#include <fstream>

using namespace std;

int s, c;

int main() {
	char v[120];
	ifstream citire("text.in");
	citire.get(v, 120);
	citire.close();
	for (int i = 0; v[i] != '\0'; i++) {
		if (v[i] >= 'a' && v[i] <= 'z' || v[i] >= 'A' && v[i] <= 'Z')
			c++;
		if (v[i] == ' ')
			s++;
	}
	ofstream afisare("text.out");
	afisare << c / s;
	afisare.close();
	return 0;
}