I'd like to remove hyphen from string values using SQL.

I have a column that contains data like:

```
middle-to high-income parents
Assets -
business – 1 year in their Certified program
explain your assets
10-12-15 years - 

```

and this is what I need from those string:

```
middle-to high-income parents
Assets
business – 1 year in their Certified program
explain your assets
10-12-15 years

```

I tried

```
rtrim(ltrim(replace(bal_sheet_item, '-', ' ')))

```

but it removed all hyphens not just the ones at the end of the string.