Tongue Twisters Day

Hi, friends today is Tongue Twisters Day.  So try these try twister words.  

• If you understand, say "understand" . If you don't understand, say " don't understand". But if you understand and say "don't understand". How do I understand that you understand? Understand! 
• The owner of the inside inn was inside his inside inn with his inside outside his inside inn. 
• "When a doctor falls ill another doctor doctor's the doctor. Does the doctor doctoring the doctor doctor the doctor in his own way or does the doctor doctoring the doctor doctors the doctor in the doctor's way".

I wish you all Happy Tongue Twisters Day.