"u ⇌ eri / X*[-spread -labdent][b-c-d-g-k-l-m-n-p-q-r-s-t-z]_s" . . . "u ⇌ eri / X*[-spread -labdent][b-c-d-g-k-l-m-n-p-q-r-s-t-z]_s" . .