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

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

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

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

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