int main()
{
	int n,i;
	int a=0,b=0,c=0,d=0;
	int sz[100];
	double e,r,j,m;
	scanf("%d\n",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d ",&(sz[i]));
	}
	for(i=0;i<n;i++)
	{
		if(sz[i]<=18)
		{
			a=a+1;
		}
		else if(sz[i]>18&&sz[i]<=35)
		{
			b=b+1;
		}
		else if(sz[i]>35&&sz[i]<=60)
		{
			c=c+1;
		}
		else
		{
			d=d+1;
		}
	}
	e=a*1.0/n;
	r=b*1.0/n;
	j=c*1.0/n;
	m=d*1.0/n;
	printf("1-18: %.2lf%%\n",e*100);
	printf("19-35: %.2lf%%\n",r*100);
	printf("36-60: %.2lf%%\n",j*100);
	printf("60??: %.2lf%%\n",m*100);
	return 0;
}

