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

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

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

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

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