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