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