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

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

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

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

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