#include <fstream>
#include <string.h>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

char c;
int sf,a=0,n=0,n,lit;
int main()
{
	while (!fin.eof())
	{
		f>>noskipws>>c;
		if ( (c >= 'a' && c <= 'z') ||  ( c >='A' && c <= 'Z') )
		{
			n++;
			lit = 1;
		}
		else
		{
			if(lit==1)
			{
				a++;
				lit=0;
			}
		}

	}
	fout<<n/a;
}