from math import *
a,b = map(int, input().split())
if a != 0 and b != 0:
    a_digit = floor(log10(abs(a)))
    b_digit = floor(log10(abs(b)))
    if a_digit >= 2 and b_digit >= 2 and 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")
else:
    print(0)