vykhlop

in: graph [a b]:
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? done!

in: begin [x]:
? 

POINT: 0
Collapsing rib 0:1
POINT: 1
Collapsing rib 1:3
POINT: 3
Collapsing rib 3:2
POINT: 2
Collapsing rib 2:4
POINT: 4
Collapsing rib 4:3
Collapsing rib 4:6
POINT: 6
Collapsing rib 6:2
Collapsing rib 6:3
Collapsing rib 6:9
POINT: 9
Collapsing point 9
Collapsing point 6
Collapsing point 4
Collapsing point 2
Collapsing point 3
Collapsing rib 1:5
POINT: 5
Collapsing rib 5:7
POINT: 7
Collapsing rib 7:1
Collapsing rib 7:8
POINT: 8
Collapsing rib 8:1
Collapsing rib 8:5
Collapsing point 8
Collapsing point 7
Collapsing point 5
Collapsing rib 1:10
POINT: 10
Collapsing rib 10:0
Collapsing point 10
Collapsing point 1
Collapsing point 0

back: 3 4
back: 2 6
back: 3 6
back: 1 7
back: 1 8
back: 5 8
back: 0 10
L[9] = 7
L[6] = 3
L[4] = 3
L[2] = 3
L[3] = 3
L[8] = 2
L[7] = 2
L[5] = 2
L[10] = 1
L[1] = 1
L[0] = 1

JOINT: 1
JOINT: 3
JOINT: 6