/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone {
	    public static void main(String[] args) {
	        Integer[] arr = {1, 2, 3, 4, 5, 6, 7};
	
	        Arrays.sort(arr, new Comparator<Integer>() {
	            @Override
	            public int compare(Integer o1, Integer o2) {
	                if (o1 % 2 == 0) {
	                    if (o1 - 1 == o2 || o1 + 1 == o2) {
	                        return -1;
	                    }
	                }
	
	                return Integer.compare(o1, o2);
	            }
	        });
	
	        System.out.println(Arrays.toString(arr));
    	}
}