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