log_file log_date log_time ocn year
ocn.log.161225-222943   161225   222943        0
ocn.log.161226-051141   161226    51141        0
ocn.log.161226-115427   161226   115427        0
ocn.log.161228-093415   161228    93415        1
ocn.log.161229-094835   161229    94835        1
ocn.log.161229-163153   161229   163153        1
ocn.log.161229-233049   161229   233049        1
ocn.log.161230-072616   161230    72616        2
ocn.log.161230-152109   161230   152109        2
ocn.log.161230-220404   161230   220404        2
ocn.log.161231-045343   161231    45343        3
ocn.log.161231-124903   161231   124903        3
ocn.log.170101-165011   170101   165011        3
ocn.log.170102-050806   170102    50806        4
ocn.log.170102-172439   170102   172439        4
ocn.log.170103-005617   170103     5617        4
ocn.log.170103-090056   170103    90056        4
ocn.log.170103-214014   170103   214014        5