How can I do logging of every screen sessions

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http://unix.stackexchange.com – I am using screen utility for couple of years. I just simply love it. In cloud machines I do have multiple screens as I work with a team. I want to log every commands that have been run in every sessions. Suppose there are three screens ex. A,B and C. I want to get A's all sessions commands and so on. It would be really great if you can give me a hint or details. Thanks in advance. (HowTos)