log_file log_date log_time ocn year
ocn.log.150605-105056   150605   105056      125
ocn.log.150605-194354   150605   194354      138
ocn.log.150606-135421   150606   135421      151
ocn.log.150607-005005   150607     5005      167
ocn.log.150607-135051   150607   135051      183
ocn.log.150608-013227   150608    13227      199
ocn.log.150608-133015   150608   133015      215
ocn.log.150610-145047   150610   145047      231
ocn.log.150611-021949   150611    21949      243
ocn.log.150611-202508   150611   202508      255
ocn.log.150612-054015   150612    54015      268
ocn.log.150612-145404   150612   145404      281
ocn.log.150613-002600   150613     2600      294
ocn.log.150615-220800   150615   220800      307
ocn.log.150713-151256   150713   151256      310