original_query: What is the difference between "sch" and "s-ch" in Romansch?
query: What is the difference between "sch" and "s-ch" in Romansch?
answer: The provided text only states that "sch" versus "s-ch" in Romansch is an example of a multigraph (a sequence of letters representing a single phoneme) where the predictability of the grapheme-phoneme correspondence is maintained as long as the multigraph cannot be broken down into smaller units.  No further detail on the specific difference in Romansch is given.