"ī_ī ⇌ tu_um / [a-b-c-d-e-g-k-o-p-q-s-t-y-z-ā-ē-ō]*[e-o]r_r_" . . . "ī_ī ⇌ tu_um / [a-b-c-d-e-g-k-o-p-q-s-t-y-z-ā-ē-ō]*[e-o]r_r_" . .