Fair game: either plates you've seen, or wish you had, but must be UA-related. My state (MA) allows only six alphanumerics (letters/numbers only) with one space.

Today I saw: 777 PN5 and I immediately reached for my phone to call for an upgrade .

In the past, I've seen UAL FCY; I guess the owner now has to trade that in for UAL JRY or something that reflects two-class plus PE.

Plates I've thought of getting: O2BGS or UAL 4MM.