a       0 +      0/2 +      0/2   (list is empty)
b       0 +      0/2 +      0/2   (list is empty)
-       0 +      1/2 +      0/2   | <0> | ... | <0> |
+       0 +      1/2 +      0/2   | 1 <0> | ... | 1 <0> |
-       0 +      2/2 +      0/2   | <1> 0 | ... | 1 <0> |
+       0 +      2/2 +      0/2   | 2 <1> 0 | ... 2 1 <0> |
-       0 +      3/2 +      0/2   | <2> 1 0 ... 2 1 <0> |
+       0 +      3/2 +      0/2   | 3 <2> 1 0 ... 2 1 <0> |
-       0 +      4/2 +      0/2   | <3> 2 1 ... 2 1 <0> |
+       0 +      4/2 +      0/2   | 4 <3> 2 1 ... 2 1 <0> |
-       0 +      5/2 +      0/2   | <4> 3 2 ... 2 1 <0> |
+       0 +      5/2 +      0/2   | 5 <4> 3 2 ... 2 1 <0> |
-       0 +      6/2 +      0/2   | <5> 4 3 ... 2 1 <0> |
+       0 +      6/2 +      0/2   | 6 <5> 4 3 ... 2 1 <0> |
-       0 +      7/2 +      0/2   | <6> 5 4 ... 5 4 <3> 2 1 ... 2 1 <0> |
+       0 +      7/2 +      0/2   | 7 <6> 5 4 ... 5 4 <3> 2 1 ... 2 1 <0> |
-       0 +      8/2 +      0/2   | <7> 6 5 ... 5 4 <3> 2 1 ... 2 1 <0> |
+       0 +      8/2 +      0/2   | 8 <7> 6 5 ... 5 4 <3> 2 1 ... 2 1 <0> |
-       0 +      9/2 +      0/2   | <8> 7 6 ... 6 5 <4> 3 2 ... 2 1 <0> |
+       0 +      9/2 +      0/2   | 9 <8> 7 6 ... 6 5 <4> 3 2 ... 2 1 <0> |
c       0 +     10/2 +      0/2   | <9> 8 7 ... 6 5 <4> 3 2 ... 2 1 <0> |
-       0 +     10/2 +      1/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 3 2 <1> 0 |
+       0 +     10/2 +      1/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 3 2 <1> |
-       0 +     10/2 +      2/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 4 3 <2> 1 |
+       0 +     10/2 +      2/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 4 3 <2> |
-       0 +     10/2 +      3/2   | <9> 8 7 ... 8 7 <6> 5 4 ... 5 4 <3> 2 |
+       0 +     10/2 +      3/2   | <9> 8 7 ... 8 7 <6> 5 4 ... 5 4 <3> |
-       0 +     10/2 +      4/2   | <9> 8 7 ... 6 5 <4> 3 |
+       0 +     10/2 +      4/2   | <9> 8 7 ... 6 5 <4> |
-       0 +     10/2 +      5/2   | <9> 8 7 ... 7 6 <5> 4 |
+       0 +     10/2 +      5/2   | <9> 8 7 ... 7 6 <5> |
-       0 +     10/2 +      6/2   | <9> 8 7 ... 8 7 <6> 5 |
+       0 +     10/2 +      6/2   | <9> 8 7 ... 8 7 <6> |
-       0 +     10/2 +      7/2   | <9> 8 7 ... 9 8 <7> 6 |
+       0 +     10/2 +      7/2   | <9> 8 7 ... 9 8 <7> |
-       0 +     10/2 +      8/2   | <9> 8 7 ... | 9 <8> 7 |
+       0 +     10/2 +      8/2   | <9> 8 | ... | 9 <8> |
-       0 +     10/2 +      9/2   | <9> 8 | ... | <9> 8 |
+       0 +     10/2 +      9/2   | <9> | ... | <9> |
D       0 +     10/2 +     10/2   (list is empty)
d       0 +     10/2 +     10/2   (list is empty)
e       0 + ? (rolling over)
f      10 + ? (rolling over)
g      10 +      0/2 +      0/2   (list is empty)
a      10 +      0/2 +      0/2   (list is empty)
b      10 +      0/2 +      0/2   (list is empty)
-      10 +      1/2 +      0/2   | <0> | ... | <0> |
+      10 +      1/2 +      0/2   | 1 <0> | ... | 1 <0> |
-      10 +      2/2 +      0/2   | <1> 0 | ... | 1 <0> |
+      10 +      2/2 +      0/2   | 2 <1> 0 | ... 2 1 <0> |
-      10 +      3/2 +      0/2   | <2> 1 0 ... 2 1 <0> |
+      10 +      3/2 +      0/2   | 3 <2> 1 0 ... 2 1 <0> |
-      10 +      4/2 +      0/2   | <3> 2 1 ... 2 1 <0> |
+      10 +      4/2 +      0/2   | 4 <3> 2 1 ... 2 1 <0> |
-      10 +      5/2 +      0/2   | <4> 3 2 ... 2 1 <0> |
+      10 +      5/2 +      0/2   | 5 <4> 3 2 ... 2 1 <0> |
-      10 +      6/2 +      0/2   | <5> 4 3 ... 2 1 <0> |
+      10 +      6/2 +      0/2   | 6 <5> 4 3 ... 2 1 <0> |
-      10 +      7/2 +      0/2   | <6> 5 4 ... 5 4 <3> 2 1 ... 2 1 <0> |
+      10 +      7/2 +      0/2   | 7 <6> 5 4 ... 5 4 <3> 2 1 ... 2 1 <0> |
-      10 +      8/2 +      0/2   | <7> 6 5 ... 5 4 <3> 2 1 ... 2 1 <0> |
+      10 +      8/2 +      0/2   | 8 <7> 6 5 ... 5 4 <3> 2 1 ... 2 1 <0> |
-      10 +      9/2 +      0/2   | <8> 7 6 ... 6 5 <4> 3 2 ... 2 1 <0> |
+      10 +      9/2 +      0/2   | 9 <8> 7 6 ... 6 5 <4> 3 2 ... 2 1 <0> |
c      10 +     10/2 +      0/2   | <9> 8 7 ... 6 5 <4> 3 2 ... 2 1 <0> |
-      10 +     10/2 +      1/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 3 2 <1> 0 |
+      10 +     10/2 +      1/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 3 2 <1> |
-      10 +     10/2 +      2/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 4 3 <2> 1 |
+      10 +     10/2 +      2/2   | <9> 8 7 ... 7 6 <5> 4 3 ... 4 3 <2> |
-      10 +     10/2 +      3/2   | <9> 8 7 ... 8 7 <6> 5 4 ... 5 4 <3> 2 |
+      10 +     10/2 +      3/2   | <9> 8 7 ... 8 7 <6> 5 4 ... 5 4 <3> |
-      10 +     10/2 +      4/2   | <9> 8 7 ... 6 5 <4> 3 |
+      10 +     10/2 +      4/2   | <9> 8 7 ... 6 5 <4> |
-      10 +     10/2 +      5/2   | <9> 8 7 ... 7 6 <5> 4 |
+      10 +     10/2 +      5/2   | <9> 8 7 ... 7 6 <5> |
-      10 +     10/2 +      6/2   | <9> 8 7 ... 8 7 <6> 5 |
+      10 +     10/2 +      6/2   | <9> 8 7 ... 8 7 <6> |
-      10 +     10/2 +      7/2   | <9> 8 7 ... 9 8 <7> 6 |
+      10 +     10/2 +      7/2   | <9> 8 7 ... 9 8 <7> |
-      10 +     10/2 +      8/2   | <9> 8 7 ... | 9 <8> 7 |
+      10 +     10/2 +      8/2   | <9> 8 | ... | 9 <8> |
-      10 +     10/2 +      9/2   | <9> 8 | ... | <9> 8 |
+      10 +     10/2 +      9/2   | <9> | ... | <9> |
D      10 +     10/2 +     10/2   (list is empty)
d      10 +     10/2 +     10/2   (list is empty)
e      10 + ? (rolling over)
f      20 + ? (rolling over)
g      20 +      0/2 +      0/2   (list is empty)