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'.

Input: Consider Input: Problem: calculate how many days it will take for 8 boys to paint a 50 m long wall if 6 boys can paint a 60 m long wall in 5 days , 
Options: a ) 4.13 days , b ) 3.13 days , c ) 513 days , d ) 9.13 days , e ) 2 days

Output: b


Input: Consider Input: Problem: excluding stoppages , the speed of a train is 30 kmph and including stoppages it is 21 kmph . of how many minutes does the train stop per hour ? 
Options: a ) 16 , b ) 17 , c ) 12 , d ) 15 , e ) 18

Output: e


Input: Consider Input: Problem: light glows for every 18 seconds . how many times did it between 1 : 57 : 58 and 3 : 20 : 47 am 
Options: a ) 281 , b ) 277 , c ) 283 , d ) 384 , e ) 385


Output: b