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: what should be the least number to be added to the 3198 number to make it divisible by 8 ? 
Options: a ) 12 , b ) 17 , c ) 2 , d ) 77 , e ) 26

Ex Output:
c


Ex Input:
Problem: there are 3 departments having students 72 , 5824 . in an exam they have to be seated in rooms such that each room has equal number of students and each room has students of one type only ( no mixing of departments ) . find the minimum number of rooms required ? 
Options: a ) 73 , b ) 74 , c ) 75 , d ) 76 , e ) 77

Ex Output:
e


Ex Input:
Problem: the average of marks obtained by 120 boys was 40 . if the average of marks of passed boys was 39 and that of failed boys was 15 , the number of boys who passed the examination is ? 
Options: a ) 100 , b ) 110 , c ) 125 , d ) 130 , e ) 145

Ex Output:

c