a,b = map(int,input().split())
def check(x):
    s = str(x)
    if s[0] == "-":
        s = s[2:]
    else:
        s = s[1:]
    return x and len(s) >= 2 and s.count("0") == len(s)
if check(a) and check(b):
    print(a*b//10)
elif abs(a*b) < 100000000:
    print(a*b)
else:
    print("E")