One of the great Yiddish writers, Aleichem is best known for his humorous tales of life among the poverty-ridden and oppressed Russian Jews of the late 19th and early 20th centuries. His works include five novels, many plays, and some 300 short stories. In the last years of his life, Aleichem lived in the US and died in New York City, where, through his work, he helped to found the Yiddish Art Theater. Many of his works have been adapted for the stage, most notably what musical? Discuss