The difference between 77 and 56 is: 
The difference between 92 and 79 is: 
The difference between 77 and 56 is: 
The difference between 77 and 56 is: 
The difference between 77 and 56 is: 
The difference between 77 and 56 is: 
The difference between 80 and 59 is: 
The difference between 77 and 56 is: 