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