Extract the names of the islands located on the Eastern Group of the Azores plateau from the text. Separate them with a comma.
These islands can be divided into three recognizable groups located on the Azores Plateau:
 The Eastern Group (Grupo Oriental) of S��o Miguel, Santa Maria and Formigas Islets
 The Central Group (Grupo Central) of Terceira, Graciosa, S��o Jorge, Pico and Faial
 The Western Group (Grupo Ocidental) of Flores and Corvo.
S��o Miguel, Santa Maria and Formigas