"iscē_r ⇌ _m / [-spread -lat -labdent]*[a-e-n-ā-ē][b-c-d-g-k-m-n-p-q-r-s-t-z]_tu_" . . . "iscē_r ⇌ _m / [-spread -lat -labdent]*[a-e-n-ā-ē][b-c-d-g-k-m-n-p-q-r-s-t-z]_tu_" . .