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: in a maths test , students were asked to find 5 / 16 of a certain number . one of the students by mistake found 5 / 6 th of that number and his answer was 200 more than the correct answer . find the number . 
Options: a ) 384 , b ) 76 , c ) 26 , d ) 28 , e ) 11

Ex Output:
a


Ex Input:
Problem: the difference of two numbers is 11 and one - fifth of their sum is 9 . find the numbers . 
Options: a ) 28 and 17 , b ) 27 and 18 , c ) 25 and 15 , d ) 27 and 15 , e ) 25 and 18

Ex Output:
a


Ex Input:
Problem: if n = 8 ^ 8 – 7 , what is the units digit of n ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 7 , e ) 4

Ex Output:

d