/* 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) throws java.lang.Exception{
		Integer[] A = {1, 2, 3, 6, 7, 8, 9, 20, 22};
 
        System.out.print("Numbers ");
        int start = 0, end;
        while((end = start) < A.length){
            while(end + 1 < A.length && A[end + 1] == A[end] + 1) end++;
            System.out.print(A[start] + 
            				 (end == start ? "":(" through " + A[end]))+ 
            				 (end < A.length - 1 ? ", ":""));
            start = end + 1;
        }
	}
}

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