Re: @!!$$%!*!(@)!!$$(!$&
As usual, my findings mostly involve what that cipher is not.
- First, I assume the cleartext words contain as much letters as ciphertext ones. That's not necesssarily the case, so don't let it stop you.
- If that assumption is true, the first scrap contains 3 2-letter words (wrote that as 2-word letters at first, lol) in a row. That's something. If we can gather a list of word combinations that make sense, we may get a better idea of the pattern. These are the 2-letter words I think we can encounter: AD, AH, AM, AN, AS, AW, BE, BY, DO, ED, EH, ER, GO, HA, HE, HI, HO, IF, IN, IS, IT, NO, OH, ON, OR, OW, OX, RE, TO, UH, UM, UP, US, WE. Note that the only words with one letter following the other (TU in the cipher) are HI and NO.
- Finally, I did a search on 9-letter words starting with 2 same letters, which OOHSKDLSY could match (I used a regexp dictionary - no idea how I lived without it). The only matching word is "OOGENESIS". I conclude that we're not dealing with monoalphabetic substitution, either - in that case 4th and 6th letters and 7th and 9th letters would be the same, as in ciphertext. It's something trickier.