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