How can I lose 3-4 kilograms in a month?

I need to lose weight fast for an important event on February. I am now 51 kg and 5'4". I want to be 49-47 kg before the event.

Dont say "you're weight is healthy no need to lose weight" bs. Dont need that.
How can I lose 3-4 kilograms in a month?
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