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