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