I have some HiSeq sequencing data with unusual Phred quality scores. The minimum is "!" and the maximum is "K" (0-42). This is not similar to any of the usual schemes: https://en.wikipedia.org/wiki/FASTQ_format
Since I cannot run a given program with this score scheme I guess I have to rescale the current scores to a standard scheme (e.g. Phred+33). Any hint how can I do this? Would it be ok to just replace "Ks" by "Js"?