Well in the meantime we should understand if the seed is 12 or 24. If it were 12 it could take a long time but maybe with a bit of luck it would be plausible if it were 24... well if it were 24 you could try praying.  However, if the other characters were present but not readable, perhaps with some tests such as those of TV series such as CSI it would be possible to recover the sentence.  Try posting a picture of just one damaged font, so maybe we can gauge how bad it is.  Only one character not the whole sheet.