"You would be"
How is 'baset ti' not an alternative? I thought 'ti' was for you (sg) and chi for you (pl).
It is definitely there as a valid answer.. Duo should let you use lower case even at the beginning, too, but sometimes it doesn't for some reason - try being sure to start with B-.
Duo are currently (late Jan 2017) upgrading their back-end computer servers and software and that seems to be affecting some functions...