The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: when positive integer n is divided by 5 , the remainder is 1 . when n is divided by 7 , the remainder is 3 . what is the smallest positive integer k such that k + n is a multiple of 40 .

Output: 7


Input: Consider Input: 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 ?

Output: 9 days


Input: Consider Input: Problem: it is currently 7 : 05 pm . what time was it in the morning exactly 51,132 minutes ago ?


Output: 6 : 53