"[i-u-ī-ū]s ⇌ [e-o-ē-ō]re / [-spread]+[-spread -labdent -low][-spread -lat -labdent -low]_" . . . "[i-u-ī-ū]s ⇌ [e-o-ē-ō]re / [-spread]+[-spread -labdent -low][-spread -lat -labdent -low]_" . .