#include<iostream>
#include<fstream>
using namespace std;

ifstream fin("intrare.txt");
ofstream fout("iesire.txt");

char c;

int nr, t;

bool ok;


int main()
{
	

	while (fin.get(c))
	{
		if ((c >= 'a'&&c <= 'z') || (c >= 'A'&&c <= 'Z'))
		{
			if (ok == false) { ok = true; nr++; }
			t++;
		}
		else ok = false;
	}
	fout << t / nr;

	
	return 0;
}