"s_ere ⇌ di_ī / [-spread -lat -labdent]*[d-r-z][a-e-i]_[c-d-g-k-t]_" . . . "s_ere ⇌ di_ī / [-spread -lat -labdent]*[d-r-z][a-e-i]_[c-d-g-k-t]_" . .