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and now the sed command matched and deleted the spaces. How can i convert wrong spaces to normal spaces?

and now the sed command matched and deleted the spaces. How can i convert wrong spaces non-breaking space to normal spaces?

Update2:

i inserted the sedcommand with [^[:graph:]] but it does not change the out.

for UKWID in 123 456 678; do
    result="$(mysql -r --column-names=0 -e "SELECT String FROM Table WHERE id = $UKWID")"
    echo "$result" | sed 's/^[^[:graph:]]*//;s/[^[:graph:]]*//' | cat -E
done
+stringA +stringB         $
   +stringc +stringx    $
+stringe +stringf      $