FDiff ← {{-˜´˘2↕𝕩}⍟𝕨 𝕩}

•Show 1 FDiff 90‿47‿58‿29‿22‿32‿55‿5‿55‿73
•Show 2 FDiff 90‿47‿58‿29‿22‿32‿55‿5‿55‿73