ballet, Ala and Lolli; but when Prokofiev brought the work in progress to him in Italy in 1915 he rejected it as "non-Russian". Urging Prokofiev to write "music that was national in character", Diaghilev then commissioned the ballet Chout ("The Buffoon"). (The original Russian-language full title was Сказка про шута, семерых шутов перешутившего, meaning "The Tale of the Buffoon who Outwits Seven Other Buffoons".) Under Diaghilev's guidance, Prokofiev chose his subject from a collection of folk tales by the ethnographer Alexander Afanasyev; the story, concerning a buffoon and a series of confidence tricks, had been previously suggested to Diaghilev by Igor Stravinsky as a possible subject for a ballet, and Diaghilev and his choreographer Léonide Massine helped Prokofiev to shape it into a ballet scenario. Prokofiev's inexperience with ballet led him to revise the work extensively in the 1920s, following Diaghilev's detailed critique, prior to its first production. The ballet's premiere in Paris on 17 May 1921 was a huge success and was greeted with great admiration by an audience that included Jean Cocteau, Igor Stravinsky and Maurice Ravel. Stravinsky called the ballet "the single piece of modern music he could listen to with pleasure", while Ravel called it "a work of genius". First World War and Revolution During World War I, Prokofiev returned to the Conservatory and studied organ to avoid conscription. He composed The Gambler based on Fyodor Dostoyevsky's novel of the same name, but rehearsals were plagued by problems, and the scheduled 1917 première had to be cancelled because of the February Revolution. In the summer of that year, Prokofiev composed his first symphony, the Classical. The name was Prokofiev's own; the music is in a style that, according to Prokofiev, Joseph Haydn would have used if he were alive at the time. The music is more or less Classical in style but incorporates more modern musical elements (see Neoclassicism). The symphony was also an exact contemporary of Prokofiev's Violin Concerto No. 1 in D major, Op. 19, which was scheduled to premiere in November 1917. The first performances of both works had to wait until 21 April 1918 and 18 October 1923, respectively. Prokofiev stayed briefly with his mother in Kislovodsk in the Caucasus. After completing the score of Seven, They Are Seven, a "Chaldean invocation" for chorus and orchestra, Prokofiev was "left with nothing to do and time hung heavily on my hands". Believing that