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

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

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

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

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