Hello monks, Code: 
$string="abc de fgh ijkl";

while($string =~ /([a-z]+ [a-z]+)/g)
{
    print "$1 $1\n";
}

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Outputs: 
abc de
fgh ijkl

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I would like it to output: 
abc de
de fgh
fgh ijkl

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I have tried doing: 
$string =~ /([a-z]+) ([a-z]+)\G(?: [a-z])*?/g

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and using lookarounds but I haven't been able to find the right combination of \G, lookarounds and matching to come out with what I want. I am also aware that I could just do: 
my @words =split $string;
for($i=0;$i<$#words;$i++)
{
   print "$words[$i] $words[$i+1]\n";
}

[download]
I trying to stick to regex's. Thanks, Alex

In reply to Combinatorial regexing by Anonymous Monk

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