log_file log_date log_time ocn year
ocn.log.160524-120959   160524   120959        0
ocn.log.160525-012216   160525    12216        1
ocn.log.160525-112903   160525   112903        3
ocn.log.160525-212731   160525   212731        4
ocn.log.160526-091957   160526    91957        6
ocn.log.160526-192332   160526   192332        7
ocn.log.160527-051652   160527    51652        9
ocn.log.160527-170523   160527   170523       10
ocn.log.160528-063240   160528    63240       12