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