How do I merge split files?

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Tags

1. #sequentially
2. #split
3. #select
4. #files
5. #parts
6. #which
7. #missing
8. #rename
9. #extension
10. #cannot
11. #create
12. #optionally
13. #folder
14. #pieces
15. #numbered
16. #include
17. #combine
18. #choose