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

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);

	int n=0,m=0;
	char c,d;

	while(scanf("%c",&c)!=EOF)
	{
		if(isalpha(c))
		{
			++n;
			if(!isalpha(d))
				++m;
		}
		d=c;
	}

	printf("%d",n/m);

	return 0;
}