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import java.util.*;
import java.util.stream.Collectors;
public class LargestMultiple {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter comma separate numbers");
final String input = scanner.nextLine();
final List<Integer> list = Arrays.stream(input.split(",")).map(Integer::valueOf).collect(Collectors.toList());
System.out.print("Output: ");
getLargestMultiple(list).stream().forEach(System.out::print);
System.out.println();
}
public static List<Integer> getLargestMultiple(List<Integer> list) {
final List<Integer> sortedList = list.stream().sorted(Comparator.reverseOrder()).collect(Collectors.toList());
if (sortedList.get(sortedList.size() - 1) % 2 == 0) {
return sortedList;
} else {
int i = list.size() - 2;
while (true) {
if (sortedList.get(i) % 2 == 0) {
List<Integer> newList = new ArrayList<>(list.size());
for (int j = 0; j <= i - 1; j++) {
newList.add(sortedList.get(j));
}
for (int j = i + 1; j < list.size(); j++) {
newList.add(sortedList.get(j));
}
newList.add(sortedList.get(i));
return newList;
}
i--;
}
}
}
}
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