void main()
{
	int n,i,sum;
	int x[100];
	int a,b,c,d;
	a=0;
	b=0;
	c=0;
	d=0;
	double a1,b1,c1,d1;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&x[i]);
		if(x[i]<=18)
			a=a+1;
		if(x[i]>=19&&x[i]<=35)
			b=b+1;
		if(x[i]>=36&&x[i]<=60)
			c=c+1;
		if(x[i]>60)
			d=d+1;
	}
	
	sum=a+b+c+d;
	a1=100*(double)a/sum;
	b1=100*(double)b/sum;
	c1=100*(double)c/sum;
	d1=100*(double)d/sum;

	printf("1-18: %.2lf%%\n",a1);
	printf("19-35: %.2lf%%\n",b1);
	printf("36-60: %.2lf%%\n",c1);
	printf("60??: %.2lf%%\n",d1);	


}