There are two coins with 2 cents and two coins with 5 cents. Take out one or several coins from them, how many different currency values can be formed.
有2分，5分的硬币各两个，从中取出一个或几个，可以组成多少种不同的币值．
<gadget id="calculator">2 + 3 + 2 + 1</gadget>
<output>8</output>

<result>8</result>