How to dump indexed commit files?

Question

git

Good evening! Please tell me, this is the situation:
- I have committed 5 commits (a, b, c, d, e)
- there are several files in each commit
Now I look, I added some files to the commits incorrectly and they should belong to other commits
Now I I want to merge all the commits into one (a) and then break them correctly.
The question is: can I do this so that when I merge into one commit (using rebase -i) somehow throw off the indexed changes to the unindexed ones? So that in one commit there are all my edits from all commits and somehow reset them to non-indexed ones, and then commit correctly. Thank you
in advance for your help!