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