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 average age of 22 members are 0 , how many members greater than 0 ? 
Options: a ) 17 , b ) 21 , c ) 22 , d ) 24 , e ) 25

Ex Output:
b


Ex Input:
Problem: if a * b * c = ( √ ( a + 2 ) ( b + 3 ) ) / ( c + 1 ) , find the value of 6 * 15 * 3 . 
Options: a ) 8 , b ) 5 , c ) 11 , d ) 3 , e ) 4

Ex Output:
d


Ex Input:
Problem: how many positive integers less than 247 are multiple of 4 but not multiples of 6 ? 
Options: a ) 20 , b ) 41 , c ) 42 , d ) 53 , e ) 64

Ex Output:

b