Huahua participated in the mathematics competition. There are 20 questions in total. 5 points are awarded for correct answers, and 1 point is deducted for wrong answers or no answers. In the end, Huahua's score is 88 points. How many questions did Huahua answer incorrectly or did not answer?
花花参加数学竞赛，共20题，答对得5分，答错或不答扣1分，最后花花的成绩是88分，请问花花答错或不答几题？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">100 - 88</gadget>
<output>12</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<result>2</result>