A group of ducklings are lined up, and Donald Duck is also in the middle of the team. Counting from the front to the back, it ranks 12th; counting from the back to the front, it ranks 15th. How many ducks are there in the team?
一群小鸭排成一行，唐老鸭也在队伍中间，从前面往后面数，它排在第12个；从后面往前面数，它排在第15个．队伍中一共有多少只鸭子．
<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">12 + 14</gadget>
<output>26</output>

<result>26</result>