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la xorxes. cusku di'e
{zi'e} should not really be necessary. I don't think any
ambiguity could arise from making it optional, but it would
still be useful because it makes many terminators elidable.
'zi'e' always terminates only the noi-phrase immediately in front of it,
and so as far as I can tell, it's exactly equivalent to 'ku'o', and
could always be replaced by it, if an arbitrary number of noi-phrases
were allowed in a row.