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: a student chose a number , multiplied it by 8 , then subtracted 138 from the result and got 102 . what was the number he chose ? 
Options: a ) 30 , b ) 120 , c ) 130 , d ) 140 , e ) 150

Ex Output:
a


Ex Input:
Problem: the ratio of the ages of mini and minakshi is 4 : 3 . the sum of their ages is 21 years . the ratio of their ages after 8 years will be 
Options: a ) 2 : 3 , b ) 20 : 17 , c ) 5 : 4 , d ) 3 : 5 , e ) 6 : 11

Ex Output:

b