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   my $left = "xfafasfsdfasdfasdsfFOOBAR";
   my $right = "FOOBAR4t11";
   # my $concat = "xfafasfsdfasdfasdsfFOOBARFOOBAR4t11";
   my $concat = $left,$right;

   my $conc = "xfafasfsdfasdfasdsfFOOBAR4t11";

   my $str3 = "AR4t11xysadgsfje";