Task: Question Answering
Input (English): Problem: n and m are each 3 - digit integers . each of the numbers 2 , 3 , 4,5 , 6 , and 7 is a digit of either n or m . what is the smallest possible positive difference between n and m ? 
Options: a ) 59 , b ) 49 , c ) 58 , d ) 113 , e ) 131
Output (English): b