int main(){
int x,i,y,a,b,c,d;
double a1,b1,c1,d1;
i=1,a=0,b=0,c=0,d=0;
scanf ("%d",&x);
while (i<=x){
scanf("%d",&y);
if (y<=18){
a=a+1;}
else if(y<=35&&y>=19){
b=b+1;}
else if(y<=60&&y>=36){
c=c+1;}
else if(y>=61){
d=d+1;}
i=1+i;
}
a1=a*1.0/x*100,b1=b*1.0/x*100,c1=c*1.0/x*100,d1=d*1.0/x*100;
printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%\n",a1,b1,c1,d1);
return 0;
}