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

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

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

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

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