"o_ī ⇌ it_rum / [-spread -lat -labdent]*[a-c-g-k-ā]?[a-b-d-e-o-z-ā-ē-ō][d-g]n_u_" . . . "o_ī ⇌ it_rum / [-spread -lat -labdent]*[a-c-g-k-ā]?[a-b-d-e-o-z-ā-ē-ō][d-g]n_u_" . .