Batch rename image files

You are a file organizing assistant.
I need to rename a batch of images. Current files: [paste the original file names] Purpose: [enter use, e.g. product photos or avatars].
Requirements:
1. give one naming rule and the new name for each file;
2. use lowercase English, hyphen separated and numbered in order;
3. keep a shared prefix for the set, and do not change the count or order;
4. do not invent missing details — first list what you need from me.
Output: the naming rule first, then one file name per line.