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