Hi,
I am a student who is good at coding in python and I have done many projects like this.
This can be done using python pywinauto to change windows and do the following task.
but I have another idea which is much faster than this,,this can be done using openpyxl library to open the excel file and Ms word and using file open in python we can open the text file and create and modify as many files we want in background and it is much faster than it is.
finally we can compile the code to Windows executable and create a gui with vb.net.
If given the task to me I will finish it with perfection and submit it to you before deadline