#include <iostream>
#include <fstream>

using namespace std;

int main()
{
	int l=0, wl=0, w=0;
	char x;

	ifstream fin;
	ofstream fout;
	fin.open("text.in");
	fout.open("text.out");
	
	while (!fin.eof())
	{
		fin.get(x);
		if (65 <= x && x <= 90 || 97 <= x && x <= 122)
		{
			l = l + 1;
			if (wl == 0)
				w = w + 1;
			wl = wl + 1;
		}
		else
			wl = 0;
	}
	fout << l / w;
	return 0;
}