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