import sys
input = sys.stdin.readline
def is_prime(x, y):
prime_num = [True] * (y+1)
for i in range(2, int(y**0.5)+1):
if prime_num[i] == False:
continue
for j in range(2*i, y+1, i):
prime_num[j] = False
for idx in range(x, y+1):
if idx <= 1:
continue
if prime_num[idx] == True:
print(idx)
if __name__ == "__main__":
m, n = map(int, input().split())
is_prime(m, n)