In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: if x ^ 2 + y ^ 2 = 15 and xy = 3 , then ( x − y ) ^ 2 = 
Options: a ) 8 , b ) 9 , c ) 14 , d ) 17 , e ) 20

Ex Output:
b


Ex Input:
Problem: if | 5 x - 5 | = 150 , what is the sum of all the possible values of x ? 
Options: a ) 2 , b ) - 2 , c ) 6 , d ) - 3 , e ) 5

Ex Output:
a


Ex Input:
Problem: what is the 8 th digit to the right of the decimal point in the decimal expansion of 1 / 37 ? 
Options: a ) 0 , b ) 2 , c ) 4 , d ) 7 , e ) 9

Ex Output:

b