Specifically De, Zhe, Ka, El, En, Ef, Ha, Che, Tse, Shcha, Dje, Ghemiddlehook,
be, de, zhe, ka, kje, el, en, ef, ha, che, tse, sha, shcha, iu, ghemiddlehook,
kabashkir, checkhakassian and the descender variants, according to feedback
from Alexei.