s = ()
s = (Chile,China,Congo,Egypt,China,India,Italy,China)
s.getLength() = 8
s.count("China") = 3
s.get(5) = India
s.indexOf("China") = 1
s.remove(5) = India
s.remove("China") = true
s.indexOf("China") = 3
s.set(2,"Japan") = Egypt
s = (Chile,Congo,Japan,China,Italy,China)
s.getLength() = 6