The difference between 17 and 17 is: 
The difference between 89 and 36 is: 
The difference between 19 and 17 is: 
The difference between 17 and 13 is: 
The difference between 37 and 17 is: 
The difference between 17 and 17 is: 
The difference between 10 and 12 is: 
The difference between 17 and 17 is: 