[moe]

Sorry, you are right, I missed that.

Arguably your solution is still different because you sort the input instead of the output, but that's unlikely to matter here.

[eridius]

The only difference is I sort before uniquing, but the python code uniques before sorting. But the result is identical (and in shell scripting, you can't unique without sorting first).

Although FWIW I just checked and the `sort` tool actually has a flag for uniquing during the sort. I don't know if that's portable though.

[moe]

Yes. Pedantically speaking his solution may be faster for the pathological case of the input consisting almost entirely of duplicates.