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