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