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 xy denotes x is raised to the power y , find the last two digits of 19413843 + 19614181
Options: a ) 67 , b ) 97 , c ) 55 , d ) 32 , e ) 62

Ex Output:
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: a father said his son , ' ' i was as old as you are at present at the time of your birth . ' ' if the father age is 62 now , the son age 5 years back was
Options: a ) 14 , b ) 17 , c ) 11 , d ) 19 , e ) 26

Ex Output:
e