Help, how do I...

[Possum]

Hey, folks, help me out here, please.

I have a trade offer from my ally, offering to trade a specific ship for "Any ship 1" of mine.

I can't seem to accept it.

The best I can seem to manage is to counter-offer, offering a specific ship of mine, and wait for him to accept it next turn, or two turns from now, or however the hell that works.

Is there no way that I can fill in the "any ship" of his offer with a specific ship of mine, and accept that this turn?

There are....evil forces at large, and time is of the essence if the monkey-people and their allies are to survive!