some omnitetrachordal systems

·05-pelog,,,,, as in 16-tET: 225 25
limma=135:128 vanishes

·07-meantone,, as in 19-tET: 3332 332
schisma=81:80 vanishes

·10-pajara,,,, as in 22-tET: 222223 2223
"paultone" -- 50:49 and 64:63 vanish

·14-injera,,,, as in 26-tET: 22222221 222221
"double diatonic" -- 50:49 and 81:80 vanish

·17-ankara,,,, as in 29-tET: 1221221222 1221222
schisma=32805:32768 vanishes

·22-shruti,,,, as in 34-tET: 2121212121212 212121212
diaschisma=2048:2025 vanishes

Ankara should be clear (medieval Arabic schismic-17 system preserved
in Modern Turkish theory), but why injera? It's that delicious
Ethiopian bread and the Ethiopian alphabet, like ours, has 26 basic
letters:

http://www.ancientscripts.com/ethiopic.html