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

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

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

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

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