#include <iostream>
#include <fstream>
using namespace std;
int main() {
	ifstream f("text.in");
	ofstream g("text.out");
	long long caractere=0, spatii=0;
	char c;
	while(!f.eof()) {
		c=f.get();
		//cout<<c;
		if(int(c)>=65 && int(c)<=90) caractere++;
		if(int(c)>=97 && int(c)<=122) caractere++;
		if(int(c)==32) spatii++;
		
	}
	//cout<<caractere<<" "<<spatii+1;
	g<<caractere/(spatii+1);
	f.close();
	g.close();
	return 0;
}