def g(a):
    cnt = 0
    while a % 10 == 0:
        a //= 10
        cnt += 1
    return a <= 9 and cnt >= 2
def f():
    A, B = map(int, input().split())
    if A == 0 or B == 0:
        return "0"
    flg = g(abs(A)) * g(abs(B))
    ans = int(A) * int(B)
    if flg:
        return ans // 10
    if -1e8 <= ans <= 1e8:
        return ans
    return "E"
print(f())