What is the output when passing the following map to the following method? { sheep=wool, house=brick, cast=plaster, wool=wool} public static void mapExercise (Map m) { Set s = new TreeSet (); for (String key : m. keySet() ) { 3 if (!m. get (key ) . equals (key) ) { Map s . add (m. get (key ) ) ; } else { s . remove (m . get (key ) ) ; System. out . println(s)