Delete fillies only races

I need to remove races that are exclusively for fillies and was thinking of this condition:

Every selections trigger expression silk_sex is equal to "f"

Does this syntax work, not certain I need the quotes around f.

Any ideas?

Hi rubold
I tested this in Time Machine and it works with and without the quotation marks. silk_sex is a string so I would use the quotes.

As MarkV has rightly said, the rule of a thumb is to use quotes with all text variables and expressions.

You can get away without them if the text string consists of only one word or a number.