import re

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

c = re.compile(r'/^-?[1-9]0{2,}$/')

if c.findall(str(a)) != [] and c.findall(str(b)) != []:
    print(a * b / 10)
else:
    if abs(a * b) <= pow(10, 9) - 1:
        print(a * b)
    else:
        print("E")