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

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

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

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

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