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

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

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

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

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