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