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