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

Ex Input:
Problem: the length of a rectangle is increased by 45 % and its breadth is decreased by 20 % . what is the effect on its area ? 
Options: a ) 1288 , b ) 1299 , c ) 1000 , d ) 10000 , e ) 11600

Ex Output:
e


Ex Input:
Problem: some people are standing square . from them 32 are removed and then form a small square and then 8 more removed . now we can not form the square . so how many people are there at the beginning ? 
Options: a ) 31 , b ) 32 , c ) 33 , d ) 34 , e ) ca n ' t be determined

Ex Output:
e


Ex Input:
Problem: the radius of a cylinder is 12 m , height 21 m . the lateral surface area of the cylinder is : 
Options: ['a ) 1584', 'b ) 1854', 'c ) 1458', 'd ) 1485', 'e ) none of them']

Ex Output:

a