import re

A, B = map(int, input().split())
prod = A * B
r = re.compile('^-?[1-9]00+$')
if r.match(str(A)) and r.match(str(B)):
    ans = str(prod // 10)
else:
    ans = str(prod) if abs(prod) <= 99999999 else "E"

print(ans)