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my $match =  $RB1 == $RB2  ?  1 
          :  $RB1 == $WR1  ?  1 
...
          :  $WR2 == $TE1  ?  1 
          :                   0
          ;

my $match =  $RB1 == $RB2  ||  $RB1 == $WR1  ||  $RB1 == $WR2  ||  $RB
+1 == $TE1
         ||  $RB2 == $WR1  ||  $RB2 == $WR2  ||  $RB2 == $TE1
         ||  $WR1 == $WR2  ||  $WR1 == $TE1
         ||  $WR2 == $TE1 ;