Results of execution:
Number of Disks: 3

A                       B                       C

x
xx
xxx
A                       B                       C
x
xx
xxx
A                       B                       C
xx                                              x
xxx

A                       B                       C
xx                                                 << here it pushes a space!
xxx                                             x

A                       B                       C
xxx                     xx
                                                x

A                       B                       C
   << same here         xx                      x
xxx

A                       B                       C
                        x
xxx                     xx

A                       B                       C
xxx                      << again here
                        x
                        xx
Total: 7

# I'm at a loss
#
# Result that appears when use warnings & use diagnostics are uncommented
#

A                       B                       C

Use of uninitialized value in concatenation (.) or string at towers2.pl line
        29, <STDIN> line 1 (#1)
    (W uninitialized) An undefined value was used as if it were already
    defined.  It was interpreted as a "" or a 0, but maybe it was a mistake.
    To suppress this warning assign a defined value to your variables.

    To help you figure out what was undefined, perl will try to tell you the
    name of the variable (if any) that was undefined. In some cases it cannot
    do this, so it also tells you what operation you used the undefined value
    in.  Note, however, that perl optimizes your program and the operation
    displayed in the warning may not necessarily appear literally in your
    program.  For example, "that $foo" is usually optimized into "that "
    . $foo, and the warning will refer to the concatenation (.) operator,
    even though there is no . in your program.

x
xx
xxx
A                       B                       C
x
Use of uninitialized value in concatenation (.) or string at towers2.pl line
        79, <STDIN> line 1 (#1)
xx
xxx
A                       B                       C
xx                                              x
xxx
Use of uninitialized value within @polea in concatenation (.) or string at
        towers2.pl line 79, <STDIN> line 1 (#1)

A                       B                       C
xx
xxx                                             x

A                       B                       C
xxx                     xx
                                                x

A                       B                       C
                        xx                      x
xxx

A                       B                       C
                        x
xxx                     xx

A                       B                       C
xxx
                        x
                        xx
Total: 7