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