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

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

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

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

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