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

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

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

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

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