How do you render into structured data, from disparate letters that are not structured?
D10
E1
H0
L2,3,9
O4,7
R8
W6
I'm sure that you could look at that and figure out how to structure it. But I highly doubt that you have a general-purpose computer program that can parse that into structured data, having never encountered such a format before. Yet, that is how many real-world PDF files are composed.