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

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

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

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

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