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