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

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

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

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

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