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

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

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

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

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