Xiao Ming has two stamps with a face value of 5 cents and 8 cents each. How many different postages can he pay with these stamps?
小明有面值5角和8角的邮票各两枚，他用这些邮票能付多少种不同的邮费？
<gadget id="calculator">2 + 3 + 2 + 1</gadget>
<output>8</output>

<result>8</result>