#include<fstream>
using namespace std;
ifstream f ("text.in");
ofstream g ("text.out");
int kca, kcu;
char c;
int litera()
{
	int ok=1;
	if (!(('a'<=c && c<='z') || ('A'<=c && c<='Z')))
		ok=0;
	if (ok) return 1;
	else return 0;
}
int main()
{
	c=f.get();
	while (!litera())
		c=f.get();
	while (c!=-1)
	{
		while (litera())
		{
			kca++;
			c=f.get();
		}
		if (!litera())
			kcu++;
		while ((!litera()) && c!=-1)
			c=f.get();
	}
	g<<kca/kcu;
	g.close();
	return 0;
}