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import java.util.ArrayList;
import java.util.Collection;
public class PlanetSet {
public static void main(String args[]) {
String names[] = { "Mercury", "Venus", "Earth", "Mars", "Jupiter",
"Saturn", "Uranus", "Neptune", "Pluto" };
Collection planets = new ArrayList();
for (int i = 0, n = names.length; i < n; i++) {
planets.add(names[i]);
}
String s[] = (String[]) planets.toArray(new String[0]);
for (int i = 0, n = s.length; i < n; i++) {
System.out.println(s[i]);
}
planets.remove(names[3]);
System.out.println(names[1] + " " + planets.contains(names[1]));
System.out.println(names[3] + " " + planets.contains(names[3]));
}
}
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