"a_iet ⇌ e_ī / X*[-spread -labdent -low]*[-spread -nas -lat -low]_[c-k-p-q]_" . . . "a_iet ⇌ e_ī / X*[-spread -labdent -low]*[-spread -nas -lat -low]_[c-k-p-q]_" . .