tested 
@terms = qw/.A. .C./;

my $clause= join "|", map quotemeta ,@terms;
while (my $line = <DATA>){
   print $1 while $line =~m/UP($clause)LB/g;
}

__DATA__
  UP.A.LB
  UP.B.LB
  UP.C.LB

[download]

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re: Comparing string to array elements by LanX
in thread Comparing string to array elements by R56

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