void main()
{
	double n;
	scanf("%lf",&n);
	int i;
	double a[100];
	for(i=0;i<n;i++)
	{
		scanf("%lf",&a[i]);
	}
	int count1=0,count2=0,count3=0,count4=0;
	for(i=0;i<n;i++)
	{
		if(a[i]<19)
			count1++;
		if(a[i]>=19&&a[i]<=35)
			count2++;
		if(a[i]>=36&&a[i]<=60)
			count3++;
		if(a[i]>60)
			count4++;
	}
	double per1=count1/n*100;
	double per2=count2/n*100;
	double per3=count3/n*100;
	double per4=count4/n*100;
	printf("1-18: %.2lf%%\n",per1);
	printf("19-35: %.2lf%%\n",per2);
	printf("36-60: %.2lf%%\n",per3);
	printf("60??: %.2lf%%\n",per4);
}