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Kosma and his wife emigrated to Paris in 1933. Eventually, he met Jacques Prévert, who introduced him to Jean Renoir. During the 1930s Kosma teamed up with Prévert to set a number of Prévert's poems to music, and have them recorded by popular singers. Several of these were hits. Kosma also composed scores to Renoir's films including "La Grande Illusion" (1937), "La Bête Humaine" ("The Human Beast", 1938), and "La Règle du jeu" ("The Rules of the Game", 1939).