###Human: Mark has 12 candy bars in total between Mars bars, Snickers, and Butterfingers.  He has 3 Snickers and 2 Mars bars.  How many Butterfingers does he have?, ### Assistant: Not counting Butterfingers Mark has 3+2=5 candy bars.
So Mark has 12-5=7 Butterfingers 
 So the answer is :  7