Mine

^
([a-z]+)-(\d+)\s+       # datorsal
([\w-]+)\s+             # user
[\w/]+\s+               # tty
[\w.:]+\s+              # from
[\w.:]+\s+              # login time
([\w.:]+)\s+            # idle
[\w.:]+\s+              # jcpu
[\w.:]+\s+              # pcpu
([.]+)\s+               # what
$