J9 C9 D9 I9 Z9 Y9 B9 M9 UC KC W9 HC S9 LC A9 Q9 TC E9 NC RC VC XC GC

now i would like to understand what these mean.....

are each one of these codes reflecting a seat? In otherwords 23 seats open?

I will do research....

I can see on ID90 that the flight has a green smiley face. I wanted to learn more.To see if i can find the actual number of avail seats.