Background: Unaspirated or tenuis consonants are occasionally marked with the modifier letter for unaspiration ⟨◌˭⟩, a superscript equal sign: ⟨t˭⟩. Usually, however, unaspirated consonants are left unmarked: ⟨t⟩.
Question: Most often, unaspirated consonants are what?
Answer:<extra_id_0>.
<extra_id_0> left unmarked<extra_id_1>