insert 1 base 4
insert 1 base 3
insert 1 base 5
insert 1 der 6 3
insert 4 base 6
insert 4 sder 6 4 2
insert 4 der 4 8
insert 4 sder 6 3 8
member 4 sder 6 4 2
true
insert 1 der 4 3
insert 1 sder 4 3 4
insert 1 sder 4 3 4
insert 1 sder 4 3 2
member 1 base  5
true
delete 1 base 6
delete 1 der 4 3
insert 1 base 7
compute 1 1
170
print 4
DListNode  4 8
ListNode   6
SDListNode 6 3 8
SDListNode 6 4 2
delete 4 base 6
delete 4 base 7
delete 4 der 4 8
member 1 sder 5 3 4
false
delete 1 base 4
delete 1 sder 4 3 2
delete 1 base 5
print 1
ListNode   3
SDListNode 4 3 4
DListNode  6 3
ListNode   7
insert 4 der 6 3
join 1 4
quit