#include<stdio.h>
#include<ctype.h>
int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char c;
	long n,m;
	int t;
	n=0;
	m=1;
	while(scanf("%c",&c)!=EOF)
	{
		if(isalpha(c))
		{
			t=1;
			n++;
		}
		else
			if(c==' ' || (c=='-' && t==1))
			{
				t=0;
				m++;
			}
	}
	printf("%ld",n/m);
	return 0;
}