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

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

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

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

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