#include <fstream>

using namespace std;

int main() {
	char s;
	bool Okay = false;
	long long nrLit = 0, nrCuv = 0;
	
	fstream in("text.in", ios::in);
	fstream out("text.out", ios::out);

	while (in.good()) {
		in.get(s);
		if (isalpha(s)) {
			nrLit++;
			Okay = true;
		}
		else if (Okay) {
			nrCuv++;
			Okay = false;
		}
	}

	out << (nrLit / nrCuv);

	in.close();
	out.close();

	return 0;
}