log_file log_date log_time ocn year
ocn.log.190904-110323   190904   110323        1
ocn.log.190905-092419   190905    92419        1
ocn.log.190906-032657   190906    32657       11
ocn.log.190906-212853   190906   212853       21
ocn.log.190907-152742   190907   152742       31
ocn.log.190908-092628   190908    92628       41
ocn.log.190909-033226   190909    33226       51
ocn.log.190909-214119   190909   214119       61
ocn.log.190910-155403   190910   155403       71
ocn.log.190911-101127   190911   101127       81
ocn.log.190912-043651   190912    43651       91
ocn.log.190912-225557   190912   225557      101
ocn.log.190913-171848   190913   171848      111
ocn.log.190914-120519   190914   120519      121
ocn.log.190915-063328   190915    63328      131
ocn.log.190916-010406   190916    10406      141
ocn.log.190916-194148   190916   194148      151
ocn.log.190917-141936   190917   141936      161
ocn.log.190918-094527   190918    94527      171
ocn.log.190919-042133   190919    42133      181
ocn.log.190920-033835   190920    33835      191
ocn.log.190921-092330   190921    92330      201
ocn.log.190922-114811   190922   114811      211
ocn.log.190923-052615   190923    52615      221
ocn.log.190924-140709   190924   140709      231