Practical exercises and examples:
"Ma"
mangetsu, man-in, murasame, meigetsu, mensetsu, men-eki, mondai,
monban, mamorigami, midashinami, miseinen, miyamairi,
murasuzume, menkyosho, tamanegi
"Na"
nanten, ninso, ningyo, ninniku, nukarumi, nuimono, nenbutsu,
norimono, nakineiri, nomimono, natsuyasumi, namakemono,
nakineiri, naganegi, etc.