log_file log_date log_time ocn year
ocn.log.150710-192703   150710   192703        1
ocn.log.150711-052304   150711    52304        6
ocn.log.150711-151656   150711   151656       11
ocn.log.150712-010937   150712    10937       16
ocn.log.150712-110128   150712   110128       21
ocn.log.150712-210011   150712   210011       26
ocn.log.150713-081304   150713    81304       31
ocn.log.150713-185641   150713   185641       36
ocn.log.150714-044859   150714    44859       41
ocn.log.150714-145220   150714   145220       46
ocn.log.150715-005714   150715     5714       51
ocn.log.150715-112021   150715   112021       56
ocn.log.150715-212334   150715   212334       61
ocn.log.150716-072629   150716    72629       66
ocn.log.150716-175346   150716   175346       71
ocn.log.150717-072819   150717    72819       76
ocn.log.150717-174442   150717   174442       81
ocn.log.150718-035103   150718    35103       86
ocn.log.150718-144319   150718   144319       91
ocn.log.150719-005155   150719     5155       96