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

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

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

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

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