// Created by PhantomCracker. Copyright(c) PhantomCracker


#include <iostream>
#include <cstring>
#include <fstream>

using namespace std;

ifstream f("text.in");
ofstream g("text.out");

char c;
int numar_cuvinte, numar_caractere, cuvant, caracter;

int main()
{
	cuvant = 1;

// citire fisier
	while(f.get(c))
	{
		if(c>='a' && c<='z' || c>='A' && c<='Z')
		{
			if(cuvant == 1)numar_cuvinte++;
			cuvant = 0;
			numar_caractere++;
			caracter = 1;
		}
		else if(c!='-') cuvant = 1;
		if(caracter == 0 && strchr(",-?!;':", c))
		{
			numar_cuvinte++; 
			caracter = 0;
		}
	}

	g<<numar_caractere/numar_cuvinte;

/*// afisare sir de caractere
	for(i=0; i<strlen(text); i++)
		cout<<text[i];*/



	cout<<endl;
	return 0;
}