How should I handle the maximum length for given names on the U.S. passport card?

I'm preparing a Form DS-11 passport application for my infant daughter, who never has been issued a prior U.S. passport. I'm considering applying for both a passport book and a passport card for her, but I saw the note in Section F (page 3) of the DS-11 instructions under "Difference Between U.S. Passport Book and Card" that reads:

The maximum number of letters provided for your given name (first and middle) on the card is 24 characters. If both your given names are more than 24 characters, you must shorten one of your given names you list on item #1 of Application Page 1.