You are responsible for censoring "banned words" in a chat. The list of banned words is given to be : "drugs", "weapons", "terrorists", "darknet", "password"

Write a Python function called censor that takes a chat message as input and censors the banned words by replacing them with stars (*). The number of * is the same as the length of the censored word.

For example:

censor("The password is fourty") "The ******** is fourty"

censor("They sell drugs in the darknet") "They sell ***** in the *******"

censor("Some terrorists are also selling weapons") "Some ********** are also selling *******