Input (grade 13): Use of the term ace in military aviation circles began in World War I (1914 - 18), when French newspapers described Adolphe Pegoud, as l'as (French for "the ace") after he became the first pilot to down five German aircraft.
Output (grade 10): French newspapers called Adolphe Pegoud, as las (French for "ace") after he became the first pilot to shoot down five German aircraft.