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 - 3 x + 2 y = 28 and 3 x + 6 y = 84 , what is the product of x and y ? 
Options: a ) 264 . , b ) 428 , c ) 0 , d ) 462 , e ) 642

Ex Output:
c


Ex Input:
Problem: what is the remainder when the number w = 14 ^ 2 * 15 ^ 8 is divided by 5 ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 4 , e ) 5

Ex Output:

a