import java.util.Scanner;

public class OrderTest {
	
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		boolean[] numberOrderArray = new boolean[1024];
		int number;
		do {
			System.out.println("next number");
			number = scanner.nextInt();
			if(number<1024&&number>0)
			{
				numberOrderArray[number]=true;
			}
		} while (number!=0);
		for (int i = 0; i < numberOrderArray.length; i++) {
			if(numberOrderArray[i])
				System.out.println(i);
		}
		
	}

}