What are your problem words/sounds?

What are your problem words/sounds? Hi everyone, I'm a stutterer, and have been since I was 9 (now 38). I'm now in the process of researching problem words, situations etc, for a book I'm writing. At the moment, I'm interested in hearing about words or sounds that stutterers have particular problems with. For me, for example, it's always Today, Tomorrow, Tonight, and certain words beginning with M. I'd love to hear your problem words/letter combinations, if you'd be happy to share? Feel free to comment below, many thanks ;) And if you'd like to get involved with more research I'm doing, please also just leave a comment and I'll be in touch. Thanks again, hope to hear from a few of you ;) Pixalo