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