log_file log_date log_time ocn year
ocn.log.140329-072102   140329    72102     1948
ocn.log.140329-170707   140329   170707     1950
ocn.log.140401-060918   140401    60918     1955
ocn.log.140401-135546   140401   135546     1960
ocn.log.140401-214101   140401   214101     1965
ocn.log.140402-055505   140402    55505     1970
ocn.log.140402-220125   140402   220125     1975
ocn.log.140403-052514   140403    52514     1980
ocn.log.140403-185107   140403   185107     1985
ocn.log.140404-034128   140404    34128     1990
ocn.log.140404-114928   140404   114928     1995
ocn.log.140404-205559   140404   205559     2000
ocn.log.140405-083832   140405    83832     2005