There is a special order that every school has to follow with their parade entries. Each school begins with the "comissão de frente" ("Front Commission" in English), that is the group of people from the school that appear first. Made of ten to fifteen people, the "comissão de frente" introduces the school and sets the mood and style of their presentation. These people have choreographed dances in fancy costumes that usually tell a short story. Following the "comissão de frente" is the first float of the samba school, called "abre-alas" ("Opening Wing" in English). These are followed by the Mestre-sala and Porta-Bandeira ("Master of Ceremonies and Flag Bearer" in English), with one to four pairs, one active and three reserve, to lead the dancers, which include the old guard veterans and the "ala das baianas", with the bateria at the rear and sometimes a brass section and guitars. . .