Hello

Not running with warnings or strict are ya!
You are assigning your $1 into the HASH slotarray, but then trying to print out the contents of the ARRAY slotarray.

# change this line, which assigns into a hash...

my $slotarray{$counter} = "$1";

# to something like this, which assigns into an array.

push( @slotarray, $1 );
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Wonko