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