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

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

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

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

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