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')