Hina had recharged her mobile network with an available pack, which has certain days of validity. She needs to calculate the date for her next recharge to keep a remainder for herself. Help her by getting the recharged date and validity days as input and Calculate the next recharge date.

Note:

The input recharged date, must be in dd/MM/yyyy format, which is on or before the current date. Otherwise, print "<> is not a valid date" and terminate

The input validity days, must be greater than 0. Otherwise, print "<> is not a valid days" and terminate

The output must be the calculated next recharge date in dd/MM/yyyy format.

Additionally please validate the below scenarios as well

Check for date with invalid month format

Check for date with invalid day format

Assumption: Consider the system current date as 29/10/2019

Sample Input 1:

Recharged date

02/02/2019

Validity days

84

Sample Output 1:

27/04/2019

Sample Input 2:

Recharged date

29/10/2109

Sample Output 2:

29/10/2109 is not a valid date

Sample Input 3:

Recharged date

29/10/2019

Validity days

-60

Sample Output 3:

-60 is not a valid days