int main()
{
       int n;
       scanf("%d",&n);
       int list1[300];
       int list2[300];
       int i,j,count=0;
       for(i=0;i<n;i++)
         scanf("%d",&list1[i]);

       for(i=0;i<n-1;i++)
		if(list1[i]==0)
			continue;
		else
		{
		     list2[count]=i;
		     count++;
		     for(j=i+1;j<n;j++)
		          if(list1[i]==list1[j])
			      list1[j]=0;
		}
       if(list1[n-1]!=0)
       {
                 list2[count]=n-1;
                 count++;
       }
                 
       for(i=0;i<count-1;i++)
                  printf("%d,",list1[list2[i]]);
       printf("%d",list1[list2[count-1]]);
       return 0;
}
