the following code generates two files according to the log.
%{
Starting lilypond.exe 2.25.18 [Untitled]...
Processing `C:/Users/Owner/AppData/Local/Temp/frescobaldi-00ou83l6/tmp2xammvvc/
document.ly'
Parsing...
Interpreting music...
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Converting to `my_special_output-menuetto.pdf'...
Interpreting music...
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Converting to `my_special_output-scherzo.pdf'...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Converting to `my_special_output.pdf'...
Success: compilation successfully completed
Completed successfully in 0.6".
%}