/* 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));
    	}
}

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