Holly loves to drink chocolate milk.  With breakfast, she drinks 8 ounces of chocolate milk before leaving for work.  During her lunch break, she buys a new 64-ounce container of chocolate milk and then drinks 8 ounces of it.  With dinner, she drinks another 8 ounces of chocolate milk.  If she ends the day with 56 ounces of chocolate milk, how many ounces of chocolate milk did she begin the day with?
Please reason step by step, and put your final answer within \boxed{}.
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