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