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

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

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

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

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