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

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

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

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

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