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: when a number is divided by 6 & then multiply by 12 the answer is 8 what is the no . ? 
Options: a ) 4.5 , b ) 5 , c ) 5.5 , d ) 5.8 , e ) 4

Ex Output:
e


Ex Input:
Problem: the tax on a commodity is diminished by 30 % but its consumption is increased by 15 % . find the decrease percent in the revenue derived from it ? 
Options: a ) 20 % , b ) 18 % , c ) 15 % , d ) 12 % , e ) 14 %

Ex Output:
a


Ex Input:
Problem: if x + y = 4 , x - y = 36 , for integers of x and y , x = ? 
Options: a ) 20 , b ) 15 , c ) 25 , d ) 13 , e ) 42

Ex Output:

a