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