import re

def anzan_ok(n):
    return re.match('^-?[1-9]00+$', str(n)) != None

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

correct = A * B
if anzan_ok(A) and anzan_ok(B):
    ans = str(correct // 10)
else:
    ans = str(correct) if -99999999 <= correct <= 99999999 else "E"

print(ans)