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  1. or download this
    for my $word (qw( abc def )) {
       print  $word =~ /\Q$word/   ?1:0,"\n";  # 1 1
    ...
    for my $word (qw( abc def )) {
       print  $word =~ /\Q$word/o  ?1:0,"\n";  # 1 0
    }