The answer is : pearls

Long story short, girl is asked to put down a 6 digit NUMBER (this is repeated about 5 times) as her pin for the register, girl writes: "pearls".

Not only are those not numbers, but the girl was probably sitting there for the entire orientation thinking of a word with six letters and of all the words in the world she chooses:pearls.

Oooooh lawdy, thanks for the giggles.
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