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

int lung=0,cuv=0,x=0;
char caract;

int main()
{
	ifstream f("text.in");
	ofstream g("text.out");
	while(f.get(caract))
	{
		if(caract>='a' && caract<='z' || caract>='A' && caract<='Z')
		{
			cuv=x+1;
			lung++;
		}	
		else x=cuv;
	}
	g<<lung/cuv;
	f.close();
	g.close();
	return 0;
}