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