There are some passengers on the bus when it leaves the starting station. At the second stop, 5 people get off first, and then 8 people get on the bus; at the third stop, 4 people get off first, and 10 people get on the bus. At this time, there are 26 passengers on the bus. How many people were in the car when it drove from the starting station?
一辆公共汽车从起点站开出时车上有一些乘客．到了第二站，先下车5人，又上车8人；到了第三站，先下车4人，上车10人，这时车上共有乘客26人．这辆车从起点站开出时车上有多少人？
<gadget id="calculator">26 - 10</gadget>
<output>16</output>

<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<gadget id="calculator">12 + 5</gadget>
<output>17</output>

<result>17</result>