"_urum ⇌ u_ / [-spread -labdent -low]*[b-d-l-p-r-s-t-z][i-u][b-g]_it_" . . . "_urum ⇌ u_ / [-spread -labdent -low]*[b-d-l-p-r-s-t-z][i-u][b-g]_it_" . .