a, b = list(map(int, input().split(' ')))

def sisu(a):
    m = 0
    while a % 10 == 0:
        a //= 10
        m += 1
    return (a, m)

ai, n = sisu(a)
bi, m = sisu(b)

if abs(ai) < 10 and abs(bi) < 10 and n >= 2 and m >= 2:
    ans = a * b // 10
else:
    temp = a * b
    if abs(temp) > 99999999:
        ans = 'E'
    else:
        ans = temp
print(ans)