def main():
    a, b = map(int, input().split(' '))

    if a == b:
        if judge(a):
            print(a)
    else:
        for i in range(a, b+1):
            if judge(i):
                print(i)

def judge(i: int): 
    if i%3 == 0:
        return True
    if judge_exists3(i):
        return True
    
    return False

def judge_exists3(i):
    if int(i%10) == 3:
        return True
    if int(i) == 3:
        return True
    if i < 10:
        return False
    else:
        return judge_exists3(i//10)

if __name__ == '__main__':
    main()