A,B =map(int,input().split())
a=str(abs(A))
b=str(abs(B))
if A*B == 0:
    print(0)
elif (a[1:]+b[1:]).strip("0") == "" and len(a)!=2 and len(b)!=2:
    print(str(A*B)[:-1])
elif abs(A*B) < 10**8:
    print(A*B)
else:
    print("E")