x︠x︦x︡ x︢x︦x︣ x︤x︦x︥ x︧x︭x︨ x︩x︭x︪ x︫x︭x︬ x︮x︦x︯

m︠m︦m︡ m︢m︦m︣ m︤m︦m︥ m︧m︭m︨ m︩m︭m︪ m︫m︭m︬ m︮m︦m︯

I︠i︦p︡ I︢i︦p︣ I︤i︦p︥ I︧i︭p︨ I︩i︭p︪ I︫i︭p︬ I︮i︦p︯

x︢a︦x︣ x︢b︦x︣ x︢c︦x︣ x︢d︦x︣ x︢e︦x︣ x︢f︦x︣ x︢g︦x︣ x︢h︦x︣ x︢i︦x︣ x︢j︦x︣ x︢k︦x︣ x︢l︦x︣ x︢m︦x︣ x︢n︦x︣ x︢o︦x︣ x︢p︦x︣ x︢q︦x︣ x︢r︦x︣ x︢s︦x︣ x︢t︦x︣ x︢u︦x︣ x︢v︦x︣ x︢w︦x︣ x︢x︦x︣ x︢y︦x︣ x︢z︦x︣

f︠i︡ n︢g︣ m︧n︨ q︩p︪ g︫y︬

ⲥ︤ⲁ︦ⲗ︦ⲁ︥ ϩ︤ⲛ︥

m︤r︣

т︮а︦т︯ т︮б︦т︯ т︮в︦т︯ т︮г︦т︯ т︮д︦т︯ т︮е︦т︯ т︮ж︦т︯ т︮з︦т︯ т︮и︦т︯ т︮й︦т︯ т︮к︦т︯ т︮л︦т︯ т︮м︦т︯ т︮н︦т︯ т︮о︦т︯ т︮п︦т︯ т︮р︦т︯ т︮с︦т︯ т︮т︦т︯ т︮ф︦т︯ т︮ц︦т︯ т︮ч︦т︯ т︮ш︦т︯ т︮щ︦т︯ т︮ъ︦т︯ т︮ы︦т︯ т︮ь︦т︯ т︮э︦т︯ т︮я︦т︯ т︮ђ︦т︯ т︮є︦т︯ т︮ѕ︦т︯ т︮і︦т︯ т︮ї︦т︯ т︮ј︦т︯ т︮љ︦т︯ т︮њ︦т︯ т︮ћ︦т︯ т︮џ︦т︯ т︮ѡ︦т︯ т︮ѣ︦т︯ т︮ѥ︦т︯ т︮ѧ︦т︯ т︮ѩ︦т︯ т︮ѫ︦т︯ т︮ѭ︦т︯ т︮ѯ︦т︯ т︮ѱ︦т︯ т︮ѳ︦т︯ т︮ѵ︦т︯ т︮ѹ︦т︯ т︮ѻ︦т︯ т︮ѽ︦т︯ т︮ҁ︦т︯

Problems: the right side marks never know how wide the preceding letter is. one idea: if any of the right-side marks appears after a letter which follows a left or combining diacritics, the letter and the right side mark exchange positions. Then mark-mark positioning could ensure the end mark would connect with the other mark.

Another problem: don't know how wide middle characters might be, from an m to an i. Really need to replace any of the combining diacritics with variable-size marks.