Word squares are like really simple crossword puzzles. There are no black squares, the grid is a square, and the "down" clues are the same as the "across" clues.

So, given a list of words, construct a word square out of them. Here is an example: 

division of a road: _ _ _ _
a location:         _ _ _ _
in proximity to:    _ _ _ _
hearing organs:     _ _ _ _

[download]
The solution: 
L A N E
A R E A
N E A R
E A R S
So, given some list of strings, return the strings in the order they would appear (down or across) in the grid. My solution uses two functions, and thus, I have decided that character count will include the "sub ...". 
#23456789_123456789_123456789_123

sub Q{my$j=pop;my@l=map$$_[$j],@_
;for(@_){return"@$_",Q(@_,++$j)if
"@{[sort@$_]}"eq"@{[sort@l]}"}()}
sub S{Q map([split//],@_),$"=""}

[download]
My code is (updated, thanks to abstracts) 131 characters.

_____________________________________________________
Jeff[japhy]Pinyan: Perl, regex, and perl hacker.
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;

In reply to (Golf) Word squares by japhy

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