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

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

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

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

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