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

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

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

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

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