#include<fstream.h>

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

int main()
{
	long long unsigned k=0,j=0,cont;
    char ch;
	while(in.good())
	{
		in.get(ch);
		if(ch<='z' && ch>='a' || ch<='Z' && ch>='A')
		{
			k++;
			cont=1;
		}
		else
			if(cont==1)
			{
				j++;
				cont=0;
			}
	}
	out<<k/j;
	return 0;
}