sub Filter {
    my $Text = shift;

    return $Text =~ /Hello(?i:one|two|three| )*World/ ? 1 : 0;
}

[download]

Or: 

sub Filter {
    my $Text = shift;

    return 0 + $Text =~ /Hello(?i:one|two|three| )*World/;
}

[download]

Or just: 

sub Filter {
    my $Text = shift;

    return $Text =~ /Hello(?i:one|two|three| )*World/;
}

[download]

In reply to Re: Regex Problem by jwkrahn
in thread Regex Problem by Anonymous Monk

Title:
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