Update: Note failure in the case of 'an log'. 

c:\@Work\Perl\monks\MadhAric>perl -wMstrict -le
"my $string = 'A log and a axe, an log and an axe';
 print qq{'$string'};
 ;;
 $string =~ s/\b([Aa])(\s+[aeiou])/$1n$2/g;
 print qq{'$string'};
"
'A log and a axe, an log and an axe'
'A log and an axe, an log and an axe'

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Even ignoring the subtleties of pronunciation you pointed out, the OPed problem statement is tricky. Some cases need 'n' deleted, so I don't see how it can be done (in a single regex) without decision-making in the replacement clause, i.e., use of the  /e modifier or equivalent trick.

Give a man a fish:  <%-(-(-(-<

In reply to Re^2: Perl pattern matching question by AnomalousMonk
in thread Perl pattern matching question by MadhAric

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