%_Both.pdf: %_Mask.pdf %_Cu.pdf
	pdftk ${^} cat output ${@}

%_90.pdf: %_Both.pdf
	pdftk ${<} cat 1-endeast output ${@}

%_nup.pdf: %_90.pdf
	pdfjam ${<} --nup 2x1 --landscape --outfile ${@}

%.pdf: %_nup.pdf
	pdftk ${<} cat 1-endwest output ${@}