log_file log_date log_time ocn year
ocn.log.140329-072102   140329    72102     1948
ocn.log.140329-170707   140329   170707     1950
ocn.log.140401-060927   140401    60927     1955
ocn.log.140401-150208   140401   150208     1960
ocn.log.140401-224737   140401   224737     1965
ocn.log.140402-084145   140402    84145     1970
ocn.log.140402-220125   140402   220125     1975
ocn.log.140403-054802   140403    54802     1980
ocn.log.140403-192119   140403   192119     1985
ocn.log.140404-114852   140404   114852     1990
ocn.log.140404-205614   140404   205614     1995
ocn.log.140405-083835   140405    83835     2000
ocn.log.140405-165914   140405   165914     2005