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