The difference between 99 and 88 is: 
The difference between 83 and 78 is: 
The difference between 99 and 88 is: 
The difference between 99 and 81 is: 
The difference between 99 and 88 is: 
The difference between 99 and 78 is: 
The difference between 100 and 89 is: 
The difference between 99 and 88 is: 