The difference between 18 and 14 is: 
The difference between 51 and 22 is: 
The difference between 18 and 14 is: 
The difference between 18 and 17 is: 
The difference between 78 and 14 is: 
The difference between 18 and 14 is: 
The difference between 21 and 17 is: 
The difference between 18 and 14 is: 