a       0 +      0/2 +      0/2,      0@e      0_u   (list is empty)
b       0 +      0/2 +      0/2,      0@e      0_u   (list is empty)
-       0 +      1/2 +      0/2,      0@e      0_u   v0..0  | <0> | ... | <0> |
+       0 +      1/2 +      0/2,      0@e      0_u   v0..0  | 1 <0> | ... | 1 <0> |
-       0 +      2/2 +      0/2,      0@e      0_u   v1..0  | <1> 0 | ... | 1 <0> |
+       0 +      2/2 +      0/2,      0@e      0_u   v1..0  | 2 <1> 0 | ... | 2 1 <0> |
-       0 +      3/2 +      0/2,      0@e      0_u   v2..0  | <2> 1 0 | ... | 2 1 <0> |
+       0 +      3/2 +      0/2,      0@e      0_u   v2..0  | 3 <2> 1 0 | ... | 3 2 1 <0> |
-       0 +      4/2 +      0/2,      0@e      0_u   v3..0  | <3> 2 1 0 | ... | 3 2 1 <0> |
+       0 +      4/2 +      0/2,      0@e      0_u   v3..0  | 4 <3> 2 1 0 | ... | 4 3 2 1 <0> |
-       0 +      5/2 +      0/2,      0@e      0_u   v4..0  | <4> 3 2 1 0 | ... | 4 3 2 1 <0> |
+       0 +      5/2 +      0/2,      0@e      0_u   v4..0  | 5 <4> 3 2 1 0 | ... | 5 4 3 2 1 <0> |
-       0 +      6/2 +      0/2,      0@e      0_u   v5..0  | <5> 4 3 2 1 0 | ... | 5 4 3 2 1 <0> |
+       0 +      6/2 +      0/2,      0@e      0_u   v5..0  | 6 <5> 4 3 2 1 0 | ... 6 5 4 3 2 1 <0> |
-       0 +      7/2 +      0/2,      0@e      0_u   v6..0  | <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
+       0 +      7/2 +      0/2,      0@e      0_u   v6..0  | 7 <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
-       0 +      8/2 +      0/2,      0@e      0_u   v7..0  | <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
+       0 +      8/2 +      0/2,      0@e      0_u   v7..0  | 8 <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
-       0 +      9/2 +      0/2,      0@e      0_u   v8..0  | <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
+       0 +      9/2 +      0/2,      0@e      0_u   v8..0  | 9 <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
c       0 +     10/2 +      0/2,      0@e      0_u   v9..0  | <9> 8 7 6 5 4 3 ... 6 5 4 3 2 1 <0> |
-       0 +     10/2 +      1/2,      0@e      1_u   v8..0  | 9 <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
+       0 +     10/2 +      1/2,      0@e      1_u   v8..0  | <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
-       0 +     10/2 +      2/2,      0@e      2_u   v7..0  | 8 <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
+       0 +     10/2 +      2/2,      0@e      2_u   v7..0  | <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
-       0 +     10/2 +      3/2,      0@e      3_u   v6..0  | 7 <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
+       0 +     10/2 +      3/2,      0@e      3_u   v6..0  | <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
-       0 +     10/2 +      4/2,      0@e      4_u   v5..0  | 6 <5> 4 3 2 1 0 | ... 6 5 4 3 2 1 <0> |
+       0 +     10/2 +      4/2,      0@e      4_u   v5..0  | <5> 4 3 2 1 0 | ... | 5 4 3 2 1 <0> |
-       0 +     10/2 +      5/2,      0@e      5_u   v4..0  | 5 <4> 3 2 1 0 | ... | 5 4 3 2 1 <0> |
+       0 +     10/2 +      5/2,      0@e      5_u   v4..0  | <4> 3 2 1 0 | ... | 4 3 2 1 <0> |
-       0 +     10/2 +      6/2,      0@e      6_u   v3..0  | 4 <3> 2 1 0 | ... | 4 3 2 1 <0> |
+       0 +     10/2 +      6/2,      0@e      6_u   v3..0  | <3> 2 1 0 | ... | 3 2 1 <0> |
-       0 +     10/2 +      7/2,      0@e      7_u   v2..0  | 3 <2> 1 0 | ... | 3 2 1 <0> |
+       0 +     10/2 +      7/2,      0@e      7_u   v2..0  | <2> 1 0 | ... | 2 1 <0> |
-       0 +     10/2 +      8/2,      0@e      8_u   v1..0  | 2 <1> 0 | ... | 2 1 <0> |
+       0 +     10/2 +      8/2,      0@e      8_u   v1..0  | <1> 0 | ... | 1 <0> |
-       0 +     10/2 +      9/2,      0@e      9_u   v0..0  | 1 <0> | ... | 1 <0> |
+       0 +     10/2 +      9/2,      0@e      9_u   v0..0  | <0> | ... | <0> |
D       0 +     10/2 +     10/2,      0@e     10_u   (list is empty)
d       0 +     10/2 +     10/2,      0@e     10_u   (list is empty)
e       0 + ? (rolling over)
f      10 + ? (rolling over)
g      10 +      0/2 +      0/2,      0@e      0_u   (list is empty)
a      10 +      0/2 +      0/2,      0@e      0_u   (list is empty)
b      10 +      0/2 +      0/2,      0@e      0_u   (list is empty)
-      10 +      1/2 +      0/2,      0@e      0_u   v0..0  | <0> | ... | <0> |
+      10 +      1/2 +      0/2,      0@e      0_u   v0..0  | 1 <0> | ... | 1 <0> |
-      10 +      2/2 +      0/2,      0@e      0_u   v1..0  | <1> 0 | ... | 1 <0> |
+      10 +      2/2 +      0/2,      0@e      0_u   v1..0  | 2 <1> 0 | ... | 2 1 <0> |
-      10 +      3/2 +      0/2,      0@e      0_u   v2..0  | <2> 1 0 | ... | 2 1 <0> |
+      10 +      3/2 +      0/2,      0@e      0_u   v2..0  | 3 <2> 1 0 | ... | 3 2 1 <0> |
-      10 +      4/2 +      0/2,      0@e      0_u   v3..0  | <3> 2 1 0 | ... | 3 2 1 <0> |
+      10 +      4/2 +      0/2,      0@e      0_u   v3..0  | 4 <3> 2 1 0 | ... | 4 3 2 1 <0> |
-      10 +      5/2 +      0/2,      0@e      0_u   v4..0  | <4> 3 2 1 0 | ... | 4 3 2 1 <0> |
+      10 +      5/2 +      0/2,      0@e      0_u   v4..0  | 5 <4> 3 2 1 0 | ... | 5 4 3 2 1 <0> |
-      10 +      6/2 +      0/2,      0@e      0_u   v5..0  | <5> 4 3 2 1 0 | ... | 5 4 3 2 1 <0> |
+      10 +      6/2 +      0/2,      0@e      0_u   v5..0  | 6 <5> 4 3 2 1 0 | ... 6 5 4 3 2 1 <0> |
-      10 +      7/2 +      0/2,      0@e      0_u   v6..0  | <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
+      10 +      7/2 +      0/2,      0@e      0_u   v6..0  | 7 <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
-      10 +      8/2 +      0/2,      0@e      0_u   v7..0  | <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
+      10 +      8/2 +      0/2,      0@e      0_u   v7..0  | 8 <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
-      10 +      9/2 +      0/2,      0@e      0_u   v8..0  | <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
+      10 +      9/2 +      0/2,      0@e      0_u   v8..0  | 9 <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
c      10 +     10/2 +      0/2,      0@e      0_u   v9..0  | <9> 8 7 6 5 4 3 ... 6 5 4 3 2 1 <0> |
-      10 +     10/2 +      1/2,      0@e      1_u   v8..0  | 9 <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
+      10 +     10/2 +      1/2,      0@e      1_u   v8..0  | <8> 7 6 5 4 3 2 ... 6 5 4 3 2 1 <0> |
-      10 +     10/2 +      2/2,      0@e      2_u   v7..0  | 8 <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
+      10 +     10/2 +      2/2,      0@e      2_u   v7..0  | <7> 6 5 4 3 2 1 ... 6 5 4 3 2 1 <0> |
-      10 +     10/2 +      3/2,      0@e      3_u   v6..0  | 7 <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
+      10 +     10/2 +      3/2,      0@e      3_u   v6..0  | <6> 5 4 3 2 1 0 ... 6 5 4 3 2 1 <0> |
-      10 +     10/2 +      4/2,      0@e      4_u   v5..0  | 6 <5> 4 3 2 1 0 | ... 6 5 4 3 2 1 <0> |
+      10 +     10/2 +      4/2,      0@e      4_u   v5..0  | <5> 4 3 2 1 0 | ... | 5 4 3 2 1 <0> |
-      10 +     10/2 +      5/2,      0@e      5_u   v4..0  | 5 <4> 3 2 1 0 | ... | 5 4 3 2 1 <0> |
+      10 +     10/2 +      5/2,      0@e      5_u   v4..0  | <4> 3 2 1 0 | ... | 4 3 2 1 <0> |
-      10 +     10/2 +      6/2,      0@e      6_u   v3..0  | 4 <3> 2 1 0 | ... | 4 3 2 1 <0> |
+      10 +     10/2 +      6/2,      0@e      6_u   v3..0  | <3> 2 1 0 | ... | 3 2 1 <0> |
-      10 +     10/2 +      7/2,      0@e      7_u   v2..0  | 3 <2> 1 0 | ... | 3 2 1 <0> |
+      10 +     10/2 +      7/2,      0@e      7_u   v2..0  | <2> 1 0 | ... | 2 1 <0> |
-      10 +     10/2 +      8/2,      0@e      8_u   v1..0  | 2 <1> 0 | ... | 2 1 <0> |
+      10 +     10/2 +      8/2,      0@e      8_u   v1..0  | <1> 0 | ... | 1 <0> |
-      10 +     10/2 +      9/2,      0@e      9_u   v0..0  | 1 <0> | ... | 1 <0> |
+      10 +     10/2 +      9/2,      0@e      9_u   v0..0  | <0> | ... | <0> |
D      10 +     10/2 +     10/2,      0@e     10_u   (list is empty)
d      10 +     10/2 +     10/2,      0@e     10_u   (list is empty)
e      10 + ? (rolling over)
f      20 + ? (rolling over)
g      20 +      0/2 +      0/2,      0@e      0_u   (list is empty)