What comes next in the pattern?

Question

What are the next couple of terms in the following pattern:

1) st, nd, rd, th...

Answer 1

th

Answer 2

For the sake of those that like a challenge I wont ruin it by saying what the pattern is, but:

st, nd, rd, th, th, th, th, th, th, th, th, th, th, th, th, th, th, th, th, th, st, nd, rd, th

Hint: those are the first _24_ in the pattern