Roulette ABC for single numbers

I am using the three letters in order to recognize patterns both on the horizontal and vertical level:
A = 1st column. B = 2nd column. C = 3rd column.
Under the streets I use these letters instead of writing winning numbers.
#17 results in B under 16-18.
#36 results in C under 34-36. And so forth and so on.
The goal is at least four of the same kind in a row on the horizontal and/or vertical level. For instance

BBBB
C
C
C
C
When I reach my goal I win with three chips on the winning number and three chips on the corresponding street.
Before I reach this goal I also bet (with minimum bet) the two most frequent streets.

 

When you have written ABC a number of times as prescribed ,
you may detect other common patterns and realistic goals with the letters.
I have had some succes with two letters in 2x2 fields. Two of each letter.
Extremely simple. So if you see 2XA and 1XC, simply bet the number corresponding to C.
Good luck!
Of course I do know that we lose in the long run.