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