Table 2. Comparison Levels Level Description Examples L1 Base characters role < roles < rule L2 Accents role < rôle < roles L3 Case/Variants role < Role < rôle L4 Punctuation role < “role” < Role Ln Identical role < ro□le < “role”Table 4. Context Sensitivity Contractions H < Z, but CH > CZ Expansions OE < Œ < OF Both カー < カア, but キー > キア