import java.util.*;
import java.math.*;
 
class sieveOfEratosthenes
{
	public void find(int a, int b){
		boolean[] prime = new boolean[b+1];
		Arrays.fill(prime, Boolean.TRUE);
		prime[0] = false;
		prime[1] = false;
		for(int i = 2; i <= b; ++i){
			if(prime[i]){
				for(int j = i*i; j <= b; j += i){
					prime[j] = false;
				}	
			}	
		}
 
		boolean primes_found = false; //Попадает ли в промежуток хоть одно простое число?
		for(int i = a; i <= b; ++i){
			if(prime[i]){
				System.out.print(i + " ");
				primes_found = true;
			}
		}
		if(!primes_found) System.out.print("Not found");
	}
}
 
class Main
{
	public static void main (String[] args)
	{
		Scanner in = new Scanner(System.in);
		int a, b;
		a = in.nextInt();
		b = in.nextInt();
		sieveOfEratosthenes c = new sieveOfEratosthenes();
		c.find(a, b);
	}
}

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