-a
a-

-abc
a-cb
bc-a
cba-

-abcde
a-cdeb
bc-ead
cde-ba
deab-c
ebdac-

-abcdefg
a-cbedgf
bc-afgde
cba-gfed
defg-abc
edgfa-cb
fgdebc-a
gfedcba-

-abcdefghi
a-cbedgfih
bc-afghide
cba-ghidef
defg-iahbc
edghi-bcfa
fghiab-ecd
gfidhce-ab
hidebfca-g
ihefcadbg-


real    0m8.080s
user    0m7.986s
sys     0m0.090s