#include <iostream.h>;
#include <stdio.h>;

using namespace std;

char ch;
int a,b,c;
short k;

int main()
{
	freopen("text.in","r",stdin);
	while ( scanf("%c",&ch) == 1 )
	{
		if ((( ch >= 'A') && ( ch <= 'Z' )) || (( ch >= 'a' ) && ( ch <= 'z' )))
		{
			k = 1;
			a++;
		}
		else if ( k == 1 )
		{
			k = 0;
			b++;
		}
	}
	if ( k == 1 ) b++;
	c = a/b;
	freopen("text.out","w",stdout);
	printf("%d", c);
	fclose(stdout);
	fclose(stdin);
	return 0;
}