Task: Question Answering
Input (English): Problem: if 8 men or 12 women can do a piece of work in 30 days , in how many days can the same work be done by 6 men and 11 women ? 
Options: a ) 10 days , b ) 11 days , c ) 13 days , d ) 15 days , e ) 18 days
Output (English): e