log_file log_date log_time ocn year
ocn.log.160527-231905   160527   231905        0
ocn.log.160528-104022   160528   104022        1
ocn.log.160528-211858   160528   211858        2
ocn.log.160529-072446   160529    72446        3
ocn.log.160529-172654   160529   172654        4
ocn.log.160530-033406   160530    33406        5
ocn.log.160530-134134   160530   134134        6
ocn.log.160531-002449   160531     2449        7
ocn.log.160531-113736   160531   113736        8
ocn.log.160531-224102   160531   224102        9
ocn.log.160601-083952   160601    83952       10
ocn.log.160601-184421   160601   184421       11
ocn.log.160602-074625   160602    74625       12