"dēbit ⇌ sī / [-spread -labdent]*[a-e-i-o-r-u-y-ā-ē-ī-ō-ū]+_" . . . "dēbit ⇌ sī / [-spread -labdent]*[a-e-i-o-r-u-y-ā-ē-ī-ō-ū]+_" . .