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