The difference between 79 and 79 is: 
The difference between 77 and 14 is: 
The difference between 79 and 79 is: 
The difference between 79 and 77 is: 
The difference between 89 and 79 is: 
The difference between 79 and 29 is: 
The difference between 70 and 78 is: 
The difference between 79 and 79 is: 