Vasya saw David Copperfield's performance and decided to impress his classmates with his own tricks. One of his tricks is as follows: Vasya asks his classmate to multiply the day of birth by , the month number by , and then report the sum of these two products. Vasya then quickly tells the classmate's birth date.
Since a queue started to form and Vasya became tired, he asks you to write a program that can perform this trick for him.
One number — the sum given to Vasya by his classmate.
Print a single line — the classmate's date of birth in the format "DD / MM".
Example 1
Example 17