import re

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

c = re.compile(r'^-?\d0{2,}$')

if c.match(str(a)) and c.match(str(b)):
    print(a * b // 10)
else:
    if abs(a * b) <= 99999999:
        print(a * b)
    else:
        print("E")