What is the chance that I will stutter on a word?

What is the chance that I will stutter on a word? I used to always think that the words that I have to say, I have troubles on. Then I looked at which letters I have troubles on in the beginning of the word. This might not be the same for other people but here are mine. b,c,d,f,g,j,k,l,m,n,p,q,r,s,t,v,w,y,z That’s 19/26, and that is 73 percent chance I will stutter on a word that starts with those letters. And that’s not including the prefixes.