int main()
{
	double a[100],b=0,c=0,d=0,e=0,f=0;
	int n,i;
	double r,s,t,u;
	scanf("%d", &n);
	for(i=0;i<n;i++)
		scanf("%lf", &a[i]);
	for(i=0;i<n;i++)
	{
		if(a[i]>60)
			b=b+1;
		else
		{
			if(a[i]>35)
				c=c+1;
			else
				if(a[i]>18)
					d=d+1;
				else
					e=e+1;
		}
	}
	f=b+c+d+e;
	u=100*b/f;
	t=100*c/f;
	s=100*d/f;
	r=100*e/f;
	printf("1-18: %.2lf%%\n", r);
	printf("19-35: %.2lf%%\n", s);
	printf("36-60: %.2lf%%\n", t);
	printf("60??: %.2lf%%\n", u);
	return 0;
}