Choose between 'say' and 'tell'.

No doubt that I ... hello to all my friends every time I meet them. To ... you the truth, we ... each other all our secrets, as we are rather close. I can't ... for sure, but it seems to me that my friend, Pavel Freedom, is still the best at ... funny stories and jokes among us. Sometimes it is very hard to ... the difference if he has ... something just for fun or a comical incident occurred in real life. Pavel has a twin brother, Harry. Even their father cannot ... one from another quite often. It is really so, I'm not ... a lie. I'm lucky to be friends with Pavel who may ... a few words and make you feel happy, especially when you are upset.