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'.

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

Example Input: Problem: a number whose fifth part increased by 7 is equal to its fourth part diminished by 7 is ?
Options: a ) 160 , b ) 180 , c ) 200 , d ) 280 , e ) none
Example Output: d

Example Input: Problem: find the least number must be subtracted from 964807 so that remaining no . is divisible by 8 ?
Options: a ) 7 , b ) 6 , c ) 5 , d ) 4 , e ) 3
Example Output:
a