int main(){
	int n,age[120],i;
	scanf("%d",&n);
	double a1_18,a19_35,a36_60,a60_;
	a1_18=0;
	a19_35=0;
	a36_60=0;
	a60_=0;
	for(i=1;i<=n;i++){
		scanf("%d",&age[i]);
		if(age[i]>=1&&age[i]<=18)
			a1_18++;
		if(age[i]>=19&&age[i]<=35)
			a19_35++;
		if(age[i]>=36&&age[i]<=60)
			a36_60++;
		if(age[i]>60)
			a60_++;
	}
	a1_18/=(n*0.01);
	a19_35/=(n*0.01);
	a36_60/=(n*0.01);
	a60_/=(n*0.01);
	printf("1-18: %.2lf%\n19-35: %.2lf%\n36-60: %.2lf%\n60??: %.2lf%\n",a1_18,a19_35,a36_60,a60_);
	return 0;
}