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