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

Ex Input:
Problem: find the number which multiplied by 15 is increased by 196 . 
Options: a ) 14 , b ) 20 , c ) 26 , d ) 28 , e ) 27

Ex Output:
a


Ex Input:
Problem: if a and b are positive numbers , and a ^ 3 + b ^ 3 = 100 , then the greatest possible value of a is between : 
Options: a ) 0 and 3 , b ) 3 and 4 , c ) 4 and 5 , d ) 5 and 7 , e ) 7 and 9

Ex Output:
c


Ex Input:
Problem: what is the sum of the integers from - 185 to 195 inclusive ? 
Options: a ) 0 , b ) 5 , c ) 375 , d ) 1905 , e ) 965

Ex Output:

d