int main(){
	int n, i;
	i=1;
	double p, q, x, y;
	p=0;
	q=0;
	x=0;
	y=0;
	scanf("%d\n",&n);
	while(i<=n){
		int a;
		scanf("%d",&a);
		if(a<=18){
			p=p+1;
		}else if(a<=35){
			q=q+1;
		}else if(a<=60){
			x=x+1;
		}else{
			y=y+1;
		}
		i++;
	}
	p=p/n*100;
	q=q/n*100;
	x=x/n*100;
	y=y/n*100;
	printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%\n",p, q, x, y);
	return 0;
}
