Study the following series.
C $ T 1 Z V R 5 + 2 9 3 O D W M F S H 6
Find what should come in place of the question mark(?)
1V , ? , 23 , OW
There is a gap of 2 between the first characters of each of the given pair. The second character of each pair is separated by one position to the right of the first character.