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