Answer:
you are a good friend Sayed im not sure if I can get it done before I get my license back and the whole time we go back and be out in a bit I guess that was the best thing I ever heard of the beast's I have
ok so take 4:20 pm and subtract 4 hrs from it so they left at 12: 20 pm
hope this helps :)
Multiply by -1 each time to get the answer in the output