/ë/ is inserted as a transition sound (1) between /n/ and /m/ and (2) between /h/ and /m/.
/m/ elided before /n/.
First person plural /-nan/ is realized as /-na/ before the past suffix.
The past suffix /-pan/ takes the form /-p/ in final position.
/a/ of the first person plural suffix is laxed in a closed syllable.