Task: Question Answering
Input (English): Problem: a man , a woman and a boy can together complete a piece of work in 3 days . if a woman alone can do it in 6 days and a boy alone in 18 days , how long will a man take to complete the work ? 
Options: a ) 5 days , b ) 8 days , c ) 7 days , d ) 9 days , e ) 8 days
Output (English): d