//
//	Loop2.java
//
//	Loop: read two postives and out all numbers between
//		until two  negatives were read
//
import java.util.Scanner;
public class Loop2
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.print("Input two positives (neg. to quit): ");
		int a, b;
		a = input.nextInt();
		b = input.nextInt();
		while(a>0 && b>0)
		{
			for(int i=a; i<=b; i++)
				System.out.print(i + " ");
			System.out.println("\n\n");
			System.out.print("Input two positives (neg. to quit): ");
			a = input.nextInt();
			b = input.nextInt();
		}

	}
}