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

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

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

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

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