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 / 4 years ago roger was 14 years old and x / 4 years from now he will be 4 x years old , how old will he be 6 x years from now ? 
Options: a ) 32 , b ) 39 , c ) 30 , d ) 40 , e ) 28

Ex Output:
b


Ex Input:
Problem: if s = x ^ 4 + y ^ 4 = 100 , then the greatest possible value of x is between 
Options: a ) 0 and 3 , b ) 3 and 6 , c ) 6 and 9 , d ) 9 and 12 , e ) 12 and 15

Ex Output:
b


Ex Input:
Problem: what is the sum r of all 3 digit numbers that leave a remainder of ' 2 ' when divided by 3 ? 
Options: a ) 897 , b ) 164850 , c ) 164749 , d ) 149700 , e ) 156720

Ex Output:

b