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#!/usr/bin/perl
# your code goes here
 
while (<>)
{
    s/([^0-9]|^)-+([^0-9]|$)/$1 $2/g;
 
    print;
}

Success #stdin #stdout 0s 6044KB

stdin

copy

2014-05-01
this-and
this-and-that
this-and-that-and-that-too
-what-about-this
or-this-
and--these
2015-01-01

stdout

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2014-05-01
this and
this and that
this and that and that too
 what about this
or this 
and these
2015-01-01

https://ideone.com/r2CI7v

language:

Perl (perl 5.28.1)

created:

visibility:

public

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