int main(){
 int i,s1,s2,s3,s4,n,x;
 double c1,c2,c3,c4;
 scanf("%d\n",&n);
 s1=0;s2=0;s3=0;s4=0;
 for (i=1;i<=n;i=i+1){
 scanf("%d",&x);
 if (x<=18) s1++;
 else if (x>18&&x<=35) s2++;
 else if (x>35&&x<=60) s3++;
 else s4++;
 }
 c1=1.0*s1/n*100;
 c2=1.0*s2/n*100;
 c3=1.0*s3/n*100;
 c4=1.0*s4/n*100;
 printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%\n",c1,c2,c3,c4);
 return 0;
}