Many of the girls graduating from the school between 1804 and 1812 , when GrÃ Ã was principal , became famous in Sweden , and were called `` the girls of GrÃ Ã '' . Many of the girls graduating from the school between 1804 and 1812 , when GrÃ Ã was principal , became famous in Sweden , and were commonly called `` The Girls of GrÃ Ã '' .