#include<fstream.h>
#include<stdio.h>
#define litera(x) (x>='A' && x<='Z' || x>='a' && x<='z')

int main()
{
	ifstream fin("text.in");
	ofstream fout("text.out");

	char x;
	int nr_l=0,nr_c=0,cuv=0;

	fin.get(x);
	do
	{
		if (litera(x))
		{
			nr_l++;
			if (cuv==0)
				nr_c++;
			cuv=1;
		}
		else
		{
			cuv=0;
		}
	}
	while (fin.get(x));
	fout<<nr_l/nr_c;

	fin.close();
	fout.close();
	return 0;
}