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")