sub processReplacements {
    my (
    $regexM,    # TERM(S) TO MATCH
    $regexR,    # REPLACEMENT TERM
    $regexI,    # FLAG FOR CASE-INSENSITVE SUBSTITUTION

    $sv,        # $sv => START, E.G. /^(.*)/;
    $ev,        # $ev => END, E.G. /(.*)$/;
    $ww,        # $ww => WHOLE-WORD, E.G. /\b(.*)\b/;
    $ch,        # $ch => DELIMIT CHARS,
                # E.G. /[.,:;!?'"](.*)[.,:;!?'"]/;
    @data ) = @_;          # INCOMING ARRAY

    my @changed;          # OUTGOING ARRAY
    my $linehead   = '';
    my $sourceline = '';

    $regexM = decode( 'utf8', $regexM );
    $regexR = decode( 'utf8', $regexR );

    my $regex = '(?'
        . ( $regexI ? 'i' : '' )
        . ':'
        . ( $sv ? '^' : $ww ? '\b' : '' )
        . ( $ch ? "[$ch]" : '' )
        . $regexM
        . ( $ch ? "[$ch]" : '' )
        . ( $ev ? '$' : $ww ? '\b' : '' )
        . ')';

    foreach my $line ( @data ) {
        chomp $line;
        $line =~ s/\s+$//;
        $linehead = $1 if $line =~ s/((?:\d+\t)+)//;

        # KEEP A COPY OF ORIGINAL FOR LATER COMPARISON
        $sourceline = $line;

        $line =~ s/$regex/$regexR/ge;

        if ( $line ne $sourceline ) {

            push @changed, "$linehead$sourceline\t$line\n";
            }
            
        $line = $linehead . $line;
        }
        
    return @changed;
    }    # END SUB processReplacements