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

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

	char c;
	int ct=0,lt=0,a=-1;

	while(scanf("%c",&c)!=EOF)
	{
		if(isalpha(c))
		{
			++lt;
			if(a==-1)
			{
				++ct;
				a=1;
			}
		}
		else
			a=-1;
	}

	printf("%d",lt/ct);

	return 0;
}