#include <fstream.h>
ifstream f("text.in");
ofstream g("text.out");
int main()
{
unsigned long cuv=0,lit=0,rez,l=0;
char c;
while (!f.eof())
	{
	f.get(c);
	if (c>='a'&&c<='z'||c>='A'&&c<='Z') {lit++;l++;}
	else if (l!=0){cuv++;l=0;}
	}
if (l!=0) cuv++;
rez=lit/cuv;
g<<rez;
return 0;
}