#include<iostream>
#include<fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

int main() {
	char a;
	int nr_caractere = 0;
	int spaces = 0;
	int result = 0;
	fin >> a;
	while(a != EOF){
		if ((a >= 65 && a <= 90) || (a >= 97 && a <= 122)){
			nr_caractere++;
		}else if(a == 32){
			spaces++;
		}
		fin>>a;
	}
	result = nr_caractere/spaces;
	fout << result;
	fin.close();
	fout.close();
	return 0; 
	
}