a, b = map(int, input().split())
sa, sb = str(abs(a)), str(abs(b))
if sa.count('0') >= 2 and sb.count('0') >= 2 and sa.count('0') == len(sa) - 1 and sb.count('0') == len(sb) - 1:
    print(a * b // 10)
elif abs(a * b) >= 10**8:
    print('E')
else:
    print(a * b)