(0 19 17)(1 6 3)(2 11 10)(4 12 8)(5 14 7)(9 18 16)(13 20 15)
ALLOWS (11/8)-SEQUENCE
1: (1 6 9)

(0 19 17)(1 18 16 9 3)(2 11 10)(4 12 8)(5 14 7)(6)(13 20 15)
2: (5 14 7)

(0 19 17)(1 18 16 9 3)(2 11 10)(4 12 8)(5)(6)(7)(13 20 15)(14)
3: (3 16 9)

(0 19 17)(1 18 16)(2 11 10)(3)(4 12 8)(5)(6)(7)(9)(13 20 15)(14)
4: (13 20 15)

(0 19 17)(1 18 16)(2 11 10)(3)(4 12 8)(5)(6)(7)(9)(13)(14)(15)(20)