A, B, C and D take part in a mathematics competition. The scores of the four are different but all are integers. The average score of the four is 80. A has the least score, 6 points less than B. D has the most score, 8 points more than C. What is the minimum?
甲乙丙丁四人参加数学比赛，四人分数各不相同但都是整数，四人的平均分是80分，甲得分最少，比乙少6分，丁得分最多，比丙多8分，丁得分最少是多少？
<gadget id="calculator">161 - 9</gadget>
<output>152</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">152 / 2</gadget>
<output>76</output>

<gadget id="calculator">76 + 9</gadget>
<output>85</output>

<result>85</result>