I have this situation. Some bots are repeating same thing. Can anyone help mi with code snippet, that halt these duplicites messages?

for example:
(14:35:18) (slut) i own ya
(14:35:18) (screw) i own ya
(14:35:18) (screw) me too
(14:35:19) (holly) me too
(14:35:20) (holly) i own ya
(14:35:20) (slut) me too
(14:35:20) (laagy) i own ya
(14:35:21) (stupid) me too
(14:35:28) (llamazzzz) stupid flooders!

and i want to see in mirc this:

(14:35:18) (slut) i own ya
(14:35:18) (screw) me too
(14:35:21) (llamazzzz) stupid flooders!

setting variable for a short time (cca 60sec, then unset) with $1- cant be, because there are these duplicated messages mixed (there are not duplicited messages at the same time and after that another dupicates)


i hope someone understand, what i need and can help me. thanks