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import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class MainClass {
public static void main(String args[]) {
String str[] = { "B", "H", "L", "M", "R" };
List list = Arrays.asList(str);
System.out.println(Collections.min(list));
System.out.println(Collections.max(list));
Comparator comp = Collections.reverseOrder();
System.out.println(Collections.min(list, comp));
System.out.println(Collections.max(list, comp));
}
}
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