Task: Question Answering
Input (English): Problem: a and b can do a piece of work in 30 days , while b and c can do the same work in 24 days and c and a in 20 days . they all work together for 10 days when b and c leave . how many days more will a take to finish the work ? 
Options: a ) 18 days , b ) 24 days , c ) 30 days , d ) 36 days , e ) 35 days
Output (English): a