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  1. or download this
    >perl -wMstrict -le
"my $chr;
...
Use of uninitialized value in concatenation (.) or string ...
Use of uninitialized value in concatenation (.) or string ...
X this AND that Y
  2. or download this
    >perl -wMstrict -le
"my $chr;
...
Use of uninitialized value in concatenation (.) or string ...
Use of uninitialized value in concatenation (.) or string ...
x This and That y
  3. or download this
    >perl -wMstrict -le
"my $chr;
...
 print \"$chr\n\";
"
X This AND That Y