I invented this over the current usage of lerfu-strings as pro-sumti, due
to the common usage problem noted in examples like abu za'u re'u cusku,
where the letter-word abu runs into the number-word za'u, and the
necessity of a boi to separate them is often forgotten in those contexts.
There are various proposals to try to fix this problem, one of which would
avoid lerfu-string pro-sumti altogether, which is why I suggested this as a
replacement.

However, I now realize that ko'ai abu za'u re'u cusku suffers from the
same problem, thus I am downvoting myself for the time being.