Renaming Random Filenames

[MJDS]

Is there a way to rename files that have random names
For example

Original files

Abcdef
Bcdefg
Cdefgh
Defghi
Jkopyth


Files then renamed by switch

Image 1
Image 2
Image 3
Image 4
Image 5

[laurentd]

Use a Counter app to generate a counter value (stored in private data), that will be incremented with each file.
Then use the Rename job element. Fixed part + counter.