A, B and C are both reading the same story book. There are 100 stories in the book. Everyone starts from a certain story and reads them in order. It is known that A has read 75 stories, B has read 60 stories, and C has read There are 52 stories. So how many stories are there at least that A, B, and C have read together?
甲、乙丙都在读同一本故事书，书中有100个故事，每人都从某个故事开始按顺序往后读，已知甲读了75个故事，乙读了60个故事，丙读了52个故事．那么甲、乙、丙三人共同读过的故事至少有多少个？
<gadget id="calculator">52 - 100</gadget>
<output>-48</output>

<gadget id="calculator">60 + (-48)</gadget>
<output>12</output>

<result>12</result>