Curve-Line System - Bluetoes edition

[Battler]

For what it's worth, the bench could be the curved counter part of "a" - start writing on the bottom right, line or curve to the top left, then curve backwards. If you start with a line, you get "a", if you start with a curve, you very much get a bench. Which would make only "o" and "d" the outlier, as they don't have any line counterparts, unless "e" is the line version of "o", which could be if you repeat the "a" process, but after the line or curve, curve frontwards instead (you end up inevitably crossing the line if you're doing the line, while with the curve, you can just seamlessly connect back to it). Which would really leave only "d" as the outlier. But I do have my idea for a line counterpart of "d" - it's the glyph that has the line, then curves upwards, then back then, often going below the line. I forgot what that glyph is in EVA.