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

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

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

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

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