A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
D G A B I L F ? ?
As long as you can count you can solve this puzzle.
So what could the next letters be?
If we set some presumptions (explained later) it could be:
We count the number of straight lines visible in the letters. Here I assume in the font used (at least the one I see on my monitor) to present letters the D is formed with a vertical line and semicircle, B is formed from E by adding 2 semicircles, and G has one vertical and one horizontal line. So D has 1 and is the first choice from choices with 1 line, G has 2, A - 3, B - 4, then we start over from one (since there are no letters with 5 lines) and the next letters with corresponding number of lines are I - 1, L - 2, F - 3. So the next letter with 4 lines is E, the next with 1 line could be J.
G O R L M U X R S
because the sequence is such: |+3|-6|+1|+8 where | means the current letter and it counts as many positions as I indicate between these '|' characters to get to the next letter
D +3 G -6 A +1 B +8 I +3 L -6 F +1 G +8 O +3 R -6 L +1 M +8 U +3 X -6 R +1 S
THIS IS THE SEQUENCE I SEE
PS.: I post a comment here because I don't have enough reputation to comment on your post @kamenf
If B has 4 lines, the D has 3, because the D and B have this same structure: [. Then is completed with semi-circles.
The next letters are :
G N Q K and henceforth, I believe
So yeah, G N are the next two if im correct
The puzzle starts from D, skips 2 to G, skips 2 backwards from D to A, skips 1 backwards from D to B and then skips 4 from D to I. Now, I as centre, skips 2 to L, skips 2 backwards to F and now it should skip 1 backwards to G, then skip forwards 4 spaces to N to now focus on N as centre and continue and therefore, G and N might be the next two.