What should I do and eat to go on an experimental concentration camp diet?

what should i eat?
how much should i push myself?
honestly i don't care about the side effects. i want to be able to immerse into the experience and understand how holocaust survivors felt just for fun.
im only going to do this for the month of June.
oh and by the way i have 0 life so please hear me out.
What should I do and eat to go on an experimental concentration camp diet?
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