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

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

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

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

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