A,B=map(int,input().split())

for i in range(A,B+1):
    n=list(str(i))
    num=[int(j) for j in n]

    flag=0
    for k in range(len(num)):
        if sum(num)%3==0 or num[k] == 3:
            if flag==0:
                print(i)
                flag=1