why would the letter I be the next letter in the sequence: C A R R
C
TD,r
It looks as if every third letter is an "r"; the remaining letters are in sequence.
There is very little information in the question to go on, but it looks like the next letter is R - an interval of five letters.
E
A
Y
y
b
CRC CBO and COL
C
TD,r
B
It looks as if every third letter is an "r"; the remaining letters are in sequence.
CARRY
y
y