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

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

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

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

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