#include<stdio.h>
#include<ctype.h>
int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char c;
	long n,m;
	n=1;
	m=1;
	scanf("%c",&c);
	while(scanf("%c",&c)!=EOF)
	{
		if(isalpha(c))
			n++;
		if(c=='-' || c==' ')
			m++;
	}
	printf("%ld",n/m);
	return 0;
}