A sticky note was found under the archive desk. It contains a short ciphertext and a margin formula. The handwriting matches the person who opened the evidence drawer.
Decrypt the message. The flag is the recovered location in lowercase, with words separated by underscores.
Alphabet: A=0, B=1, ..., Z=25
Encryption: E(x) = (5*x + 8) mod 26
Ciphertext:
QIZPWTFAWVZUAEZR
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