log_file log_date log_time ocn year
ocn.log.150708-191050   150708   191050        1
ocn.log.150709-041419   150709    41419        2
ocn.log.150709-103947   150709   103947        3
ocn.log.150709-205814   150709   205814        4
ocn.log.150710-175430   150710   175430        5
ocn.log.150711-020015   150711    20015        6
ocn.log.150711-060154   150711    60154        7
ocn.log.150711-101017   150711   101017        8
ocn.log.150711-142015   150711   142015        9
ocn.log.150711-184304   150711   184304       10
ocn.log.150711-234037   150711   234037       11
ocn.log.150712-035902   150712    35902       12
ocn.log.150712-075903   150712    75903       13
ocn.log.150712-115955   150712   115955       14
ocn.log.150712-160705   150712   160705       15
ocn.log.150713-163501   150713   163501       16
ocn.log.150713-210112   150713   210112       17
ocn.log.150714-013626   150714    13626       18
ocn.log.150714-053855   150714    53855       19