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