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: a train is 300 meter long is running at a speed of 35 km / hour . in what time will it pass a bridge of 115 meter length ? 
Options: a ) 29 , b ) 23 , c ) 47.119 , d ) 44.586 , e ) 42.686

Ex Output:
e


Ex Input:
Problem: a and b can do a work in 12 days , b and c in 15 days , c and a in 20 days . if a , b and c work together , they will complete the work in : 
Options: a ) 5 days , b ) 7 5 / 6 days , c ) 10 days , d ) 15 2 / 3 days , e ) none of these

Ex Output:
c


Ex Input:
Problem: if 4 men can colour 48 m long cloth in 2 days , then 8 men can colour 36 m long cloth in 
Options: a ) 0.75 day , b ) 2 days , c ) 1.2 days , d ) 4 days , e ) 5 days

Ex Output:

a