-------------------------------------------------------------------------------
--  Functions for collecting possible edits
letters :: [Word8]
letters = map (BI.c2w . toLower) (['\65'..'\90'] ++ ['\97'..'\122'])
letters :: [Word8]
letters = map (BI.c2w . toLower) (['\65'..'\90'] ++ ['\97'..'\122'])
letters = map (BI.c2w . toLower) (['\65'..'\90'] ++ ['\97'..'\122'])