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