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