When responding to questions about multiple subjects, people will simply answer the questions in that order, adding 'respectively' to the end to make it clear which response applies to which subject. I think this is mostly when asking about two people / subjects, but I've heard three and four occasionally.
How old are Jason and Tommy?
They're 21 and 23, respectively.
However, what if you misspeak, and accidentally say them in the opposite order? Aside from simply correcting yourself, is there a word you can use that would work, while keeping the rest of the sentence the same? As in:
They're 23 and 21, [insert word here].