/*
Output:
I
P
G
E
* */
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class MainClass {
public static void main(String args[]) {
String elements[] = { "I", "P", "E", "G", "P" };
Set set = new HashSet(Arrays.asList(elements));
Iterator iter = set.iterator();
while (iter.hasNext()) {
System.out.println(iter.next());
}
}
}
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