Nintex workflow for SharePoint document library based on folder names

I want to build a nintex workflow, which has folder and subfolders. The workflow will be triggered on the basis of folder names. For example: If "A" is the main folder and "B" is a sub-folder within "A", and if I upload any document in "A" the email will be triggered to specific group people. Similarly, if I upload a document in folder "B",  the email will be triggered to specific group people. Could you please help to solve this. Thank you!