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: car a travels at 3 times the average speed of car b . car a started to travel at 12 : 00 o ' clock , car b started to travel at 16 : 00 o ' clock . what is the speed of car b ( in km / h ) if the total distance that both cars traveled until 18 : 00 was 1000 km ?
Options: a ) 10 . , b ) 25 . , c ) 30 . , d ) 38 , e ) 50 .

Ex Output:
e

Ex Input:
Problem: the average of 10 consecutive odd numbers is 22 . what is the sum of the first 3 numbers ?
Options: a ) 13 , b ) 45 , c ) 17 , d ) 220 , e ) 90

Ex Output:
b

Ex Input:
Problem: the sum of present age of abe and the age before 7 years is 29 . find the present age of abe . what will be his age after 7 years ?
Options: a ) 25 , b ) 26 , c ) 27 , d ) 28 , e ) 29

Ex Output:
a