D-6

v-3.3.0
---
backward => status 8 --> 5
1. status => 6 --> 5

	==> done
D-6

v-3.3.1
---
backward => status 8 --> 5
1. status => 7 --> 6

	==> done
D-6

v-3.3.2
---
backward => status 8 --> 5
1. status => 8 --> 7

	==> done
D-6

v-3.3.3
---
backward => status 8 --> 5
1. status => 5 --> 4 (Prev.4)

	==> done
D-6

v-3.3.4.0
---
1. jump: positions in B_UR

	==> done
D-6

v-4.0.0
---
1. next nodes
2. B_LR.VH: status 8 --> 9

	==> done