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