log_file log_date log_time ocn year
ocn.log.151226-065642   151226    65642       31
ocn.log.151227-084214   151227    84214       32
ocn.log.151227-193923   151227   193923       32
ocn.log.151228-061622   151228    61622       34
ocn.log.151228-190124   151228   190124       35
ocn.log.151229-214333   151229   214333       37
ocn.log.151230-075927   151230    75927       38
ocn.log.151230-235759   151230   235759       40
ocn.log.151231-095650   151231    95650       41
ocn.log.160101-010019   160101    10019       43