Superb Pied-a-Terre     This elegant and gracious prewar residence is characterized by large sun-flooded rooms which enjoy open city views. The expansive living room faces south, and has a wood-burning fireplace, and adjoins a charming library (or third bedroom with en suite bath) with a small terrace. On the other side of the apartment is the Master Bedroom, which also faces south and has an en suite bath. A second bedroom with its own en suite bath is conveniently located adjacent to the Master bedroom. A fully equipped kitchen is off the entrance foyer, and the apartment has a generous amount of closet space. Perfectly positioned in a top location, 3 East 77th Street is a premier full-service "white glove" cooperative building seconds from Fifth Avenue and Central Park.