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