# cities ={"Bangalore","Hyd","Ram","Ravi"}
# cities.add("Amaravathi")
# cities.update(["Tirupathi"])
# cities.remove("Bangalore")
# cities.discard("Ram")
# cities
# print(len(cities))
# print(cities)

# for a in cities:
#     print(a)


newCities = { "Bangalore","Hyd","Ram","Ravi"}
newCities.add("Kochin")
newCities.update(["Mumbai"])
newCities.remove("Bangalore")
newCities.discard("Hyd")
for a in newCities:
    print(a)

# print("Bangalore" in cities)