Problem Description

Xiao Ming has just learned how many days each month has and how to determine if a year is a common year or a leap year. He wonders if it's possible to use a programming method to find out how many days are in a given month. Can you do it?

Input Format

Input consists of a single line containing two integers, $A$ and $B$, representing the year and month of a date, respectively. It is assumed that $2000 \leq A \leq 3000$ and $1 \leq B \leq 12$.

Output Format

Output a single line containing an integer, which represents the number of days in the input month.

Sample Input and Output

Sample Input #1

2022 1

Sample Output #1

31

Sample Input #2

2020 2

Sample Output #2

29

见题面 Input 部分

见题面 Output 部分