log_file log_date log_time ocn year
ocn.log.150709-132839   150709   132839      125
ocn.log.150711-122929   150711   122929      138
ocn.log.150711-224203   150711   224203      151
ocn.log.150712-093658   150712    93658      167
ocn.log.150712-203413   150712   203413      183
ocn.log.150713-073718   150713    73718      199
ocn.log.150713-192603   150713   192603      215
ocn.log.150714-064857   150714    64857      231
ocn.log.150714-114322   150714   114322        0
ocn.log.150714-114942   150714   114942      231
ocn.log.150714-203538   150714   203538      243
ocn.log.150715-051622   150715    51622      255