UMVUE of a Bernoulli polynomial

Let $x_{1}=1$, $x_{2}=0$, $x_{3}=0$, $x_{4}=1$, $x_{5}=0$, $x_{6}=1$ be the data on a random sample of size $6$ from $\mathrm{Bin}(1,\theta)$ distribution, where $\theta\in(0,1)$. Then the uniformly minimum variance unbiased estimate of $\theta(1+\theta)$ equals __________