(0 21 17)(1 18 9 7 4)(2 5 3)(6 20 15 13 11)(8 12 10)(14 19 16)
ALLOWS (11/8)-SEQUENCE
1: (0 7 17)
(0)(1 18 9 7 21 17 4)(2 5 3)(6 20 15 13 11)(8 12 10)(14 19 16)
2: (6 20 15)
(0)(1 18 9 7 21 17 4)(2 5 3)(6 13 11)(8 12 10)(14 19 16)(15)(20)
3: (14 19 16)
(0)(1 18 9 7 21 17 4)(2 5 3)(6 13 11)(8 12 10)(14)(15)(16)(19)(20)
4: (4 9 17)
(0)(1 18 9)(2 5 3)(4)(6 13 11)(7 21 17)(8 12 10)(14)(15)(16)(19)(20)