from math import *
a,b = map(int, input().split())
a_digit = floor(log10(abs(a)))
b_digit = floor(log10(abs(b)))
if a%(10**a_digit) == 0 and b%(10**b_digit) == 0:
    print(a*b // 10)
else:
    if -99999999 <= a*b <= 99999999:
        print(a*b)
    else:
        print("E")