How to label mileposts stacked vertically?

[JohnJanzen]

I'm trying to label DOT mile marker points where the label is stacked vertically in the same way you would see them along a highway.  The style exists but I can't figure out the labels.

[KyleGonterwitz · Accepted solution]

label the first character of the milepost string, then label the second character on the next line, third char on the next line, like so:

Layers/KDOT_reference_post_markers (MapServer) 

[JohnJanzen]

Thank you Kyle.  This makes complete sense.