Alexander Scriabin, Maurice Ravel, Igor Stravinsky and Olivier Messiaen (mode 2). Modular rotation in sequences of thirds The Five made this device of Franz Liszt their own to base a loose symphonic-poem type of structure. This way, they could avoid the rigid Western laws of modulation in sonata form, allowing the form of a musical composition to be shaped entirely by the "content" of the music (its programmatic statements and visual descriptions) rather than by formal laws of symmetry. This loose structure became especially important for Mussorgsky's Pictures at an Exhibition, a work that may have done more than any other to define the Russian style. Pentatonic scale This stylistic aspect became used by every Russian nationalist composer. Its distinctive feature is to have only five notes in the octave, rather than the seven of the heptatonic scales (e.g., major and minor). The pentatonic scale is one of the ways of suggesting a "primitive" folk-melodic style as well as the "Eastern" element (Middle East, Asia). A melodic example of the "major-mode" pentatonic scale (C-D-E-G-A) can be heard at the entrance of the chorus at the beginning of Borodin's Prince Igor. Orientalism One hallmark of "The Five" was its reliance on orientalism. Many quintessentially "Russian" works were composed in orientalist style, such as Balakirev's Islamey, Borodin's Prince Igor and Rimsky-Korsakov's Scheherazade. Orientalism, in fact, became widely considered in the West both one of the best-known aspects of Russian music and a trait of Russian national character. As leader of "The Five," Balakirev encouraged the use of eastern themes and harmonies to set their "Russian" music apart from the German symphonism of Anton Rubinstein and other Western-oriented composers. Because Rimsky-Korsakov used Russian folk and oriental melodies in his First Symphony, Stasov and the other nationalists dubbed it the "First Russian Symphony," even though Rubinstein had written his Ocean Symphony a dozen years before it. These were themes Balakirev had transcribed in the Caucasus. "The symphony is good," Cui wrote to Rimsky-Korsakov in 1863, while the latter was out on naval deployment. "We played it a few days ago at Balakirev's—to the great pleasure of Stassov. It is really Russian. Only a Russian could have composed it, because it lacks the slightest trace of any stagnant Germanness." Orientalism was not confined to using authentic Eastern melodies. What became more important than the melodies themselves were the musical conventions added to them. These conventions