#include <stdio.h>
#include <string.h>
#include <ctype.h>
char c;
int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	long long sum=0,nrc=0;
	bool k=0;
	while(scanf("%c",&c)!=EOF)
	{
		if((c>='a' && c<='z')||(c>='A' && c<='Z'))
		{
			k=1;
			sum++;
		}
		else 
			if(k==1)
				nrc++;
	}
	printf("%lld\n",sum/nrc);
	return 0;
}