M (1931) is a German drama film directed by Fritz Lang. The film tells the story of a serial killer in a German city who is hunted by both the police and the criminal underworld. The film is considered a classic of the early sound era and is widely regarded as one of
From Wikipedia
M is the thirteenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of several Western European languages and others worldwide. Its name in English is em, plural ems.