def f(x):
    a = 0
    while x % 2 == 0:
        a += 1
        x //= 2
    b = 0
    while x % 5 == 0:
        b += 1
        x //= 5

    return a, b


def ask(a, b, fin=False):
    x = 1
    for _ in range(a):
        x *= 2
    for _ in range(b):
        x *= 5
    print(x, flush=True)
    if fin:
        exit()
    return f(int(input()))


x1, x2 = map(int, input().split())
a1, b1 = f(x1)
a2, b2 = f(x2)

while a1 != 7 or b1 != 9:
    if abs(a1 - a2) + abs(b1 - b2) <= 1:
        ask(a2, b2, True)
        exit()

    if a1 < 7:
        a1 += 1
    elif a1 > 7:
        a1 -= 1
    else:
        b1 += 1
    a2, b2 = ask(a1, b1)

    if a1 == a2 and b1 == b2:
        exit()

d = abs(a1 - a2) + abs(b1 - b2)
if d == 1:
    ask(a2, b2, True)
    exit()

if d % 2 == 0:
    a1 = 9
    a2, b2 = ask(a1, b1)

while 1:
    if abs(a1 - a2) + abs(b1 - b2) <= 1:
        ask(a2, b2, True)
        exit()

    da = abs(a1 - a2)
    db = abs(b1 - b2)

    if da > db:
        if a1 > a2:
            a1 -= 1
        else:
            a1 += 1
    else:
        if b1 > b2:
            b1 -= 1
        else:
            b1 += 1

    a2, b2 = ask(a1, b1)
    if a1 == a2 and b1 == b2:
        exit()