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

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

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

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

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