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