Czech pop group and backing band. Formed in 1971, initiated by the central commitee of the Czechoslovak communist youth organization, ÚV SSM. Led by Tomáš Háša, since 1974 by Jindřich Brabec. Vocal soloists: Jana Matysová & Helena Vrtichová (1971–1973), Jiří Štědroň (1971–1975), vocal group Planety (1974–19??). Members: Jiří Kosek (piano, organ), Václav Matoušek (guitar), Gustav Konárek (bass guitar), Pavel Lébl (drums), Antonín Bulka (trumpet), František Havlíček (saxophone).