There are 4 red pencils and 3 blue pencils in the drawer. If you take it with your eyes closed, make sure you take out at least 1 blue pencil. How many pencils do you have to take at a time?
抽屉里面有4支红铅笔和3支蓝铅笔，如果闭着眼睛拿，要保证至少拿出1支蓝铅笔，一次须拿多少支
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>