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: how many two - digit numbers yield a remainder of 1 when divided by both 6 and 15 ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4

Ex Output:
c


Ex Input:
Problem: 5.005 / 4.004 = 
Options: a ) 1.05 , b ) 1.50015 , c ) 1.501 , d ) 1.5015 , e ) 1.25

Ex Output:
e


Ex Input:
Problem: if p and q are prime numbers , how many divisors does the product p ^ 3 * q ^ 6 have ? 
Options: a ) 9 , b ) 12 , c ) 18 , d ) 28 , e ) 363

Ex Output:

d