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

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

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

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

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