Pontic Greeks on the eastern shore of the Black Sea or "Karadeniz" regions have their own distinct Greek style of folk music, motifs from which were used with great success by Helena Paparizou. The diaspora of Greek speaking Pontic people from that region introduced Pontic music to Greece after 1924 population exchange between Turkey and Greece. The region's dance style uses unique techniques like odd shoulder tremors and knee bends. Folk dances include the gerasari, trygona, kots, omal, serra, kotsari and tik.