Rules
S-Assimilation
If the stem contains an z, s, dz, ts or ts', the prefix for the first person singular subject will be es- instead of esh-, and the first person plural subject will be ts'- instead of ch'-.
This rule does not apply to the Upper Inlet dialect, because s- and sh- (as well as z- and zh-, ts' and ch' and so on) have merged.
Example:
d+esh+t'us > dest'us