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