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