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: evaluate 248 + 64 − − √ − − − − − − − − − √ 
Options: a ) 14 , b ) 26 , c ) 16 , d ) 36 , e ) 46

Ex Output:
c


Ex Input:
Problem: 54671 - 14456 - 35466 = ? 
Options: a ) 2449 , b ) 5449 , c ) 6749 , d ) 6449 , e ) 4749

Ex Output:
e


Ex Input:
Problem: if 1 / 5 th of a number decreased by 5 is 5 , then the number is 
Options: a ) 25 , b ) 50 , c ) 60 , d ) 75 , e ) none

Ex Output:

b