#include <stdio.h>
#include <ctype.h>
#include <string.h>

int sum,nr,i,ok;
char s;

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	sum=nr=0;
	ok=1;
	for (; !feof(stdin);)
	{	
		scanf("%c",&s);
		s=toupper(s);
		if (s<='Z' && s>='A'){
			sum++;
			if (ok) nr++;
			ok=0;
		}
		else ok=1;
	}
	printf("%d\n",sum/nr);
	return 0;
}