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

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

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

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

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