Move files from parent directories to subdirectories based on file extension

I have 139 directories that contain a subdirectory and files that need to be moved into the subdirectory. I thought the simplest way to do this would be to use a mv command to recursively move the files based on their file extension of which there are only two. I have something like this:

xxx_03_001
 - xxx_03_001/xxx_03_001.csv
 - xxx_03_001/xxx_03_001.jpg
 - xxx_03_001/submissionDocumentation

xxx_03_002
 - xxx_03_002/xxx_03_002.csv
 - xxx_03_002/xxx_03_002.jpg
 - xxx_03_002/submissionDocumentation

I want:

xxx_03_001
 - xxx_03_001/submissionDocumentation/xxx_03_001.csv
 - xxx_03_001/submissionDocumentation/xxx_03_001.jpg

xxx_03_002
 - xxx_03_002/submissionDocumentation/xxx_03_002.csv
 - xxx_03_002/submissionDocumentation/xxx_03_002.jpg

How can I move these files recursively into the submissionDocumentation subdirectory within each parent directory?

>Solution :

Run this in the top level directory:

for dir in xxx_*; do
    mv "$dir"/*.{csv,jpg} "$dir"/submissionDocumentation/
done