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

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

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

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

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