The difference between 77 and 59 is: 
The difference between 56 and 55 is: 
The difference between 79 and 59 is: 
The difference between 77 and 56 is: 
The difference between 77 and 59 is: 
The difference between 77 and 19 is: 
The difference between 79 and 51 is: 
The difference between 77 and 59 is: 