"nge_e ⇌ ctu_um / [-spread -lat]*[b-d-f-m-n-p-r-s-t-z][a-e-i]_r_" . . . "nge_e ⇌ ctu_um / [-spread -lat]*[b-d-f-m-n-p-r-s-t-z][a-e-i]_r_" . .