Sstrhsrtj

As the title says, i'm trying to compile 13 images into one page.
I've tried multiple options, but none seem to work. Ideally the legend would be next to the other images on the side rather than part of the table but i wasn't able to do this.
In addition, they do not fit on the page... Any suggestions? Currently, i'm resorting to using a compiled version from pptx but this has weird borders that are only visible after downloading the pdf (resolving this could also be an option!)

documentclass{article}
usepackage{graphicx}
usepackage{subfig}
begin{document}

     begin{figure}[H]

    centering 

begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{Model A}

end{subfigure}hfil 

begin{subfigure}{0.3textwidth}

  includegraphics[width=linewidth]{example-image-b}

  caption{}

end{subfigure}hfil 

begin{subfigure}{0.3textwidth}

  includegraphics[width=linewidth]{example-image-c}

  caption{}

end{subfigure}hfil 



medskip

begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{Model B}

end{subfigure}hfil 

begin{subfigure}{0.3textwidth}

  includegraphics[width=linewidth]{example-image-a}

  caption{}

end{subfigure}hfil 

begin{subfigure}{0.3textwidth}

  includegraphics[width=linewidth]{example-image-a}

  caption{}

end{subfigure}hfil 

medskip

begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{Model C}

end{subfigure}hfil

begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{}

end{subfigure}

begin{subfigure}{0.3textwidth}

  includegraphics[height=textwidth]{example-image-a}

end{subfigure}

%begin{subfigure}{0.3textwidth} % here idealy nothing with the previous two lined up with those above 

%includegraphics[height=textwidth]{example-image-9x16} %where to put legend... ideallky on the side not here. 

%end{subfigure}



medskip



begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{Model D}

end{subfigure}hfil

begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{}

end{subfigure}hfil

begin{subfigure}{0.3textwidth}

includegraphics[width=linewidth]{example-image-a}

end{subfigure}hfil



medskip



begin{subfigure}{0.3textwidth}

  includegraphics[width=0.8linewidth]{example-image-a}

  caption{model E}

end{subfigure}hfil

begin{subfigure}{0.3textwidth}

 includegraphics[width=linewidth]{example-image-a}

  caption{}

end{subfigure}hfil

begin{subfigure}{0.3textwidth}

%here ideally nothing also with previous two lined up with those above only the one with
caption{}
end{subfigure}hfil
caption{caption}
end{figure}
end{document}