from math import sqrt
	
def is_prime(n):
	sqrtN = int(sqrt(n) + 1)
	for p in range(2, sqrtN+1):
		if (n/p).is_integer():
			return False
	
	return True

def ddd():
	from sys import stdout
	
	a, b = map(int, input().strip().split())
	stdout.write('\n'.join(map(str, filter(is_prime, range(max(2,a), b+1)))))
		
		
			
ddd()