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  1. or download this
        /(${\join"|",@x,map(quotemeta,@y)})/
  2. or download this
        /(${\join($",@x)}${\quotemeta(join($",@y))})/
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        my @x= qw( : ; - );
    my @y= qw( . | ? );
    /(@x|\Q@y\E)/
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        /(:|;|-|\.|\||\?)/
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        /(: ; -|\.\ \|\ \?)/