R6400 password recovery answers to security questions format

I'm trying to recover the password for my R6400 router and I know the answers to the security questions but they're not working. I'm wondering if I'm entering them incorrectly. Does anyone know if the answers are case sensitive? Also, are spaces allowed? If not, is there a character that might be automatically substituted if I had used a space (like a period or hyphen)?

I've made enough changes to the router settings that I'd rather not reset it if I can avoid it.

Thanks in advance.