import re

A, B = map(int, input().split())

prod = A * B
anzan_ok = lambda n: re.match('^-?[1-9]00+$', str(n))
if anzan_ok(A) and anzan_ok(B):
    ans = str(prod // 10)
else:
    ans = str(prod) if abs(prod) <= 99999999 else "E"

print(ans)