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: a train 150 m long crosses a platform 130 m long in 20 sec ; find the speed of the train ? 
Options: a ) 50 , b ) 60 , c ) 55 , d ) 45 , e ) 53

Output: a


Input: Consider Input: Problem: two trains of equal lengths take 10 sec and 15 sec respectively to cross a telegraph post . if the length of each train be 200 m , in what time will they cross other travelling in opposite direction ? 
Options: a ) 17 sec , b ) 12 sec , c ) 16 sec , d ) 15 sec , e ) 20 sec

Output: e


Input: Consider Input: Problem: a cube of side 3 meter length is cut into small cubes of side 15 cm each . how many such small cubes can be obtained ? 
Options: a ) 8078 , b ) 1040 , c ) 1058 , d ) 1021 , e ) 8000


Output: e