a, b = map(int, input().split())
ok = 0
for i in range(2, 10):
    if a % (10**i) != 0 or abs(a // (10**i)) >= 10:
        continue
    for j in range(2, 10):
        if ok == 0 and b % (10**j) == 0 and 1 <= abs(b // (10**j)) <= 9:
            ok = 1
            print(a * b // 10)
if ok == 0:
    if -99999999 <= a * b <= 99999999:
        print(a * b)
    else:
        print("E")