Conditional Format small cap large cap letters

[johnny52]

How would I conditional format Large and small letters

my example ...... a cell has the following Ss or Rr I want to highlight either one but the formula is also bringing in RR and SS.
I need to differentiate the large and small letters. something like =a1="Rr"....but obviously that's not working
Thanks everybody.

 

[6StringJazzer]

=A1=EXACT("Rr")

 

[Fluff]

How about

=EXACT(A1,"Rr")

 

[6StringJazzer]

=A1=EXACT("Rr")

Wrong syntax Fluff has the right answer. Wasn't thinking.