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

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

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

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

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