Here is code for the same. You need to change path to where that files are..

my $hour = (localtime)[2];
my $nu=0;
if($hour eq 0)
{$hour= 23;}
else
{$hour--;}
my @files1 = <dir path of you file>; i.e. <C:\\WINDOWS\\*.log>;
 

while($nu < 6)
{
    if($hour>23)
     {$hour = 0;}
     my $hr= sprintf("%02d",$hour);
     foreach my $file (@files1)
      {
          if($file =~ /_($hr)\.txt/ )
           {print $file . "\n";}
       }
     $hour++;
     $nu++;
}
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