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

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

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

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

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