Thanks for raising this query,.i am also, facing problem with these 2 alphabets ,.. "k" and "p" an x2 more Well, what you have to do, you first practised the word,... "K" in simple manner, the more slowly you speak your chances to speak fluently,, so always remember whenever you think that you fumble or stutter in. Any word,.. try to speak slow as you can, because what happens your mind doesn't allow to memorize those "k" an "p" alphabets really well, so, always speaks slowly, and take deep breaths,..whenever you speak.or start your sentence with those alphabets,.. And do practise,.. Well, no issue you can also, message me directly,.in here,..and we can connect to overcome this thing..