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