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I just found a neat way to crib a Hill cipher. If you find the inverse of a matrix composed of ciphertext vectors,
and multiply that by a matrix of plaintext, you get a transpose of the key, or something like that. I managed to
get it working for an 8×8 Hill cipher. Here is a link to a paper about Hill ciphers and about the technique:

p.s. I found the Spanish word I was looking for.

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