| { 0 } + { 1 2 4 7 }
---+------------------------
a | { 3 8 } + { 6 7 1 2 4 }
---+------------------------
a | { 8 3 } + { 1 2 4 6 7 }
---+------------------------
b | { 9 5 } + { 6 7 1 2 4 }
---+------------------------
b | { X 5 } + { 6 7 1 2 4 }
---+------------------------
a | { 8 3 } + { 1 2 4 6 7 }
---+------------------------
b | { 9 5 } + { 1 2 4 6 7 }
---+------------------------
b | { X 5 } + { 1 2 4 6 7 }
---+------------------------
|
| { .0 } + { .1 .2 .4 .7 }
---+-------------------------------
a | { .3 .8 } + { .6 .7 .1 .2 .4 }
---+-------------------------------
a | { .8 .3 } + { .1 .2 .4 .6 .7 }
---+-------------------------------
b | { .9 .5 } + { .6 .7 .1 .2 .4 }
---+-------------------------------
b | { 10 .5 } + { .6 .7 .1 .2 .4 }
---+-------------------------------
a | { .8 .3 } + { .1 .2 .4 .6 .7 }
---+-------------------------------
b | { .9 .5 } + { .1 .2 .4 .6 .7 }
---+-------------------------------
b | { 10 .5 } + { .1 .2 .4 .6 .7 }
---+-------------------------------
|