def x_to_cnt(x):
    cnt2,cnt5=0,0
    while x%2==0:
        x//=2
        cnt2+=1
    while x%5==0:
        x//=5
        cnt5+=1
    return cnt2,cnt5
def cnt_to_x(cnt2,cnt5):
    return 2**cnt2*5**cnt5
x1,x2=map(int,input().split())
for _ in range(35):
    assert 10**9%x1==0
    assert 10**9%x2==0
    if x1==x2:
        exit()
    c12,c15=x_to_cnt(x1)
    c22,c25=x_to_cnt(x2)
    if abs(c12-c22)>=abs(c15-c25):
        if c12<c22:
            x1*=2
        elif c12>c22:
            x1//=2
        else:
            assert False
    else:
        if c15<c25:
            x1*=5
        elif c15>c25:
            x1//=5
        else:
            assert False
    print(x1)
    if x1==x2:
        exit()
    x2=int(input())