Use of uninitialized value in range (or flip) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
Use of uninitialized value in range (or flop) at C:\gash.pl line 10.
$VAR1 = {
          '11' => 12,
          '1' => 2,
          '3' => 4,
          '7' => 8,
          '9' => 10,
          '5' => 6
        };