The level hint says if you follow a common method it will not be hard to decrypt. Specially when they are common word terms. But I can’t figure out what’s the type of encryption here.
Well, the hint of the challenge is a bit simplistic.
Obviously, what you have isn’t in plain text, but this has not been encrypted, it has been hashed. Take a look here: https://en.wikipedia.org/wiki/Cryptographic_hash_function and try to understand how you can get the plaintext from the hashes.