In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: if a man earns rs 20 on first day and spends rs 15 on second day , and earns rs 20 on third day and spends rs 15 on fourth day and goes on on which day he will be having rs 60 . 
Options: a ) 40 rs , b ) 45 rs , c ) 50 rs , d ) 55 rs , e ) 60 rs

Ex Output:
e


Ex Input:
Problem: a rectangular plot measuring 10 meters by 50 meters is to be enclosed by wire fencing . if the poles of the fence are kept 5 meters apart . how many poles will be needed ? 
Options: a ) 46 m , b ) 66 m , c ) 26 m , d ) 24 m , e ) 25 m

Ex Output:
d


Ex Input:
Problem: calculate the l . c . m of 2 / 5 , 4 / 7 , 3 / 7 , 6 / 13 is : 
Options: a ) 15 , b ) 14 , c ) 13 , d ) 12 , e ) 11

Ex Output:

d