def main():

    A, B = map(int, input().split())
    listA, listB = str(A), str(B)
    aCount, bCount = listA.count("0"), listB.count("0")
    a, b = A / aCount, B / bCount
    if A % 100 == 0 and B % 100 == 0 and 1 <= a <= 9 and 1 <= b <= 9:
        print(int(A * B / 10))
    elif abs(A * B) > 99999999:
        print("E")
    else:
        print(A * B)

if __name__ == "__main__":
    main()