def f(x):
    for i in range(1, 10):
        for j in range(2, 10):
            if abs(x) == i * 10 ** j:
                return True
    return False

A, B = map(int, input().split())
if f(A) and f(B):
	print(A * B // 10)
else:
    ans = A * B
    if abs(ans) >= 10 ** 8:
        print("E")
    else:
        print(ans)