Task: Question Answering
Input (English): Problem: 6 men and 8 women can complete a work in 10 days . 26 men and 48 women can finish the same work in 2 days . 15 men and 20 women can do the same work in - days . 
Options: a ) 4 days , b ) 6 days , c ) 2 days , d ) 8 days , e ) 10 days
Output (English): a