(0 21 2)(1 20 18 11 9 5 3)(4 12 6)(7 17 8)(10 15 13)(14 19 16)
ALLOWS (11/8)-SEQUENCE
1: (0 4 12)

(0 6 4 21 2)(1 20 18 11 9 5 3)(7 17 8)(10 15 13)(12)(14 19 16)
2: (1 20 9)

(0 6 4 21 2)(1 5 3)(7 17 8)(9 18 11)(10 15 13)(12)(14 19 16)(20)
3: (0 6 2)

(0)(1 5 3)(2 4 21)(6)(7 17 8)(9 18 11)(10 15 13)(12)(14 19 16)(20)
4: (1 5 3)

(0)(1)(2 4 21)(3)(5)(6)(7 17 8)(9 18 11)(10 15 13)(12)(14 19 16)(20)