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

int main()
{
	int n;
	char c;
	int caractere=0;
	int cuvinte=0; 
	ifstream f("text.in");
	ofstream g("text.out");
	while(!f.eof())
	{
		c=f.get();
		if((c>='a' && c<='z') || ( c>='A' && c<='Z'))
		{
			caractere++;
			cuvinte++;
			while(!f.eof())
			{
				c=f.get();
				if(!((c>='a' && c<='z') || ( c>='A' && c<='Z')))
				{
					break;
				}
				else
				{
					caractere++;
				}
			}
		}
	}
	g<<caractere/cuvinte;
	f.close();
	g.close();
	return 0;
}