Bstan-ʼdzin-rnam-rgyal Druṅ-yig.

Bcom ldan ʼdas Mi-ʼkhrugs-paʼi gzuṅs chog thar paʼi lcags kyu chog bsgrigs
Commentaries on difficult points in the Tibetan grammatical treatises, the Sum cu pa and Rtags kyi ʼjug pa of Thon-mi Sambhoṭa