## test_ll_concat
### 0 0
list1 = -1, list2 = -1
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 1
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 2
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 5)
5 (prev 9 next -1)
6 (prev 9 next 9)
### 1 0
list1 = 1, list2 = -1
1 (prev 9 next -1)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 1
list1 = 1, list2 = 4
1 (prev 9 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 2
list1 = 1, list2 = 4
1 (prev 9 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 5)
5 (prev 9 next -1)
6 (prev 9 next 9)
### 2 0
list1 = 1, list2 = -1
1 (prev 9 next 2)
2 (prev 9 next -1)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 1
list1 = 1, list2 = 4
1 (prev 9 next 2)
2 (prev 9 next 4)
3 (prev 9 next 9)
4 (prev 9 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 2
list1 = 1, list2 = 4
1 (prev 9 next 2)
2 (prev 9 next 4)
3 (prev 9 next 9)
4 (prev 9 next 5)
5 (prev 9 next -1)
6 (prev 9 next 9)
## test_dl_concat
### 0 0
list1 = -1, list2 = -1
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 1
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 4 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 2
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 5 next 5)
5 (prev 4 next -1)
6 (prev 9 next 9)
### 0 3
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 6 next 5)
5 (prev 4 next 6)
6 (prev 5 next -1)
### 1 0
list1 = 1, list2 = -1
1 (prev 1 next -1)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 1
list1 = 1, list2 = 4
1 (prev 4 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 2
list1 = 1, list2 = 4
1 (prev 5 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next 5)
5 (prev 4 next -1)
6 (prev 9 next 9)
### 1 3
list1 = 1, list2 = 4
1 (prev 6 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next 5)
5 (prev 4 next 6)
6 (prev 5 next -1)
### 2 0
list1 = 1, list2 = -1
1 (prev 2 next 2)
2 (prev 1 next -1)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 1
list1 = 1, list2 = 4
1 (prev 4 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 2
list1 = 1, list2 = 4
1 (prev 5 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next 5)
5 (prev 4 next -1)
6 (prev 9 next 9)
### 2 3
list1 = 1, list2 = 4
1 (prev 6 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next 5)
5 (prev 4 next 6)
6 (prev 5 next -1)
### 3 0
list1 = 1, list2 = -1
1 (prev 3 next 2)
2 (prev 1 next 3)
3 (prev 2 next -1)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 3 1
list1 = 1, list2 = 4
1 (prev 4 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next -1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 3 2
list1 = 1, list2 = 4
1 (prev 5 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next 5)
5 (prev 4 next -1)
6 (prev 9 next 9)
### 3 3
list1 = 1, list2 = 4
1 (prev 6 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next 5)
5 (prev 4 next 6)
6 (prev 5 next -1)
## test_cdl_concat
### 0 0
list1 = -1, list2 = -1
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 1
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 4 next 4)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 0 2
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 5 next 5)
5 (prev 4 next 4)
6 (prev 9 next 9)
### 0 3
list1 = 4, list2 = 4
1 (prev 9 next 9)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 6 next 5)
5 (prev 4 next 6)
6 (prev 5 next 4)
### 1 0
list1 = 1, list2 = -1
1 (prev 1 next 1)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 1
list1 = 1, list2 = 4
1 (prev 4 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next 1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 1 2
list1 = 1, list2 = 4
1 (prev 5 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next 5)
5 (prev 4 next 1)
6 (prev 9 next 9)
### 1 3
list1 = 1, list2 = 4
1 (prev 6 next 4)
2 (prev 9 next 9)
3 (prev 9 next 9)
4 (prev 1 next 5)
5 (prev 4 next 6)
6 (prev 5 next 1)
### 2 0
list1 = 1, list2 = -1
1 (prev 2 next 2)
2 (prev 1 next 1)
3 (prev 9 next 9)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 1
list1 = 1, list2 = 4
1 (prev 4 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next 1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 2 2
list1 = 1, list2 = 4
1 (prev 5 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next 5)
5 (prev 4 next 1)
6 (prev 9 next 9)
### 2 3
list1 = 1, list2 = 4
1 (prev 6 next 2)
2 (prev 1 next 4)
3 (prev 9 next 9)
4 (prev 2 next 5)
5 (prev 4 next 6)
6 (prev 5 next 1)
### 3 0
list1 = 1, list2 = -1
1 (prev 3 next 2)
2 (prev 1 next 3)
3 (prev 2 next 1)
4 (prev 9 next 9)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 3 1
list1 = 1, list2 = 4
1 (prev 4 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next 1)
5 (prev 9 next 9)
6 (prev 9 next 9)
### 3 2
list1 = 1, list2 = 4
1 (prev 5 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next 5)
5 (prev 4 next 1)
6 (prev 9 next 9)
### 3 3
list1 = 1, list2 = 4
1 (prev 6 next 2)
2 (prev 1 next 3)
3 (prev 2 next 4)
4 (prev 3 next 5)
5 (prev 4 next 6)
6 (prev 5 next 1)