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  1. or download this
    #!/usr/bin/perl -w
    
    ...
    keys %count;
    my @uniq = sort keys %count;
    print "\nunique values are @uniq\n"
    
  2. or download this
    
    3 occured 3 times
    ...
    
    unique values are 1 2 3 4 5 6 7 9