The difference between 77 and 69 is: 
The difference between 63 and 37 is: 
The difference between 79 and 69 is: 
The difference between 77 and 63 is: 
The difference between 77 and 69 is: 
The difference between 77 and 59 is: 
The difference between 78 and 60 is: 
The difference between 77 and 69 is: 