I-1) ______ ______ ______ ______ ______ ______
P | | | | | | | | | | | | | | | | | |
->|17| |-->|15| |-->|13| |-->|19| |-->|21| |-->|23|\|
| | | | | | | | | | | | | | | | | |
------ ------ ------ ------ ------ ------
______
Avail | | |
-->|25| |
| | |
------
I-2) 15
I-3) 6
J-1) 2 1 4 8 9
J-2) Duplicates list P
J-3) 2 8 9 1 5 2 8 9