The difference between 99 and 87 is: 
The difference between 91 and 39 is: 
The difference between 99 and 87 is: 
The difference between 99 and 88 is: 
The difference between 99 and 87 is: 
The difference between 99 and 27 is: 
The difference between 100 and 88 is: 
The difference between 99 and 87 is: 