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

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

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

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

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