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