a,b = map(int, input().split())


def calc(a,b):
    l=[]
    for i in range(a,b+1):
        if i%3==0:
            l.append(i)
            break
        m=i
        while 1:
            if (m%10==3) or (m==0):
                l.append(i)
                break
            m=int(m/10)
    return l
            
print(l)