Save text file with a new name without changing the contents

Question

I have a text file with a specific order of lines and content. I need to write a code that gets the values in rows numbers 3, 4 and 5 then it pushes those values to the file name and save the file by giving the new name and keep a the original file without any changes.

Example:

File name: Default.txt

1. ABC
   
   
2. DEF
   
   
3. ValueNo1
   
4. ValueNo2
   
   
5. ValueNo3
   
   
6. fdf
   
   
7. FDFDFD
   
8. The new file name will be Default-ValueNo1ValueNo1-ValueNo2ValueNo2-ValueNo3ValueNo3