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  1. or download this
    #!env perl
    #
    ...
    # Again...
    ($c1, $c2, $c3, $c4) = ('m','n','o','p','q');
    PH::exec($X);
    
  2. or download this
    $  perl ex_sql_placeholders_via_tied_variables.pl
    PREPARED: select foo from a_table where x=? or y in (?, ?, ?)
    EXEC(b, 3, e, f)
    EXEC(n, o, p, m)
    
  3. or download this
    package PH;
    
    ...
    }
    
    1;