The main examination committee of "Traveling Beauty" prepares the final examination questions for the third to eighth grades. Each grade has 12 questions, and at least 8 questions are different from other grades. If a question appears in different grades, it can only appear 3 times at most. At least how many final test questions should be prepared for this event.
"走美"主试委员会为三～八年级准备决赛试题．每个年级12道题，并且至少有8道题与其它各年级都不同．如果某道题出现在不同年级，最多只能出现3次．本届活动至少要准备多少道决赛试题．
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">48 + 8</gadget>
<output>56</output>

<result>56</result>