import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

def check(n):
    if n == 0:
        return False
    l = len(str(n))
    cnt = 0
    while n%10 == 0:
        n //= 10
        cnt += 1
    return cnt > 1 and cnt == l-1

a, b = MI()
m = 1
if a*b < 0:
    m = -1

a = abs(a)
b = abs(b)

if check(a) and check(b):
    ans = a*b*m
    if ans%10 == 0:
        ans //= 10
else:
    ans = a*b*m
    if not -99999999 <= ans <= 99999999:
        ans = 'E'

print(ans)