Shashkevychivka, Spelling of the Mermaid of the Dniester, and also Spelling of the Ruthenian Triad is the first phonetic spelling system for the Ukrainian language based on the adapted Cyrillic script, used by the Ruthenian Triad in the almanac "Mermaid of the Dniester" (1837). Markiian Shashkevych used to be considered the author of the spelling system used in "Mermaid of the Dniester", which is why it is called Orthography of Shashkevych or "Shashkevychivka". The use of the phonetic principle of spelling was motivated in the foreword by Markiian Shashkevych by the fact that "«we need to know what the true face is in the present language; because of this we follow the rule: „write as you hear, and read as you see“»".