#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	if(a%2==0)
	{
		if(b=2)
		{
			cout<<"28";
		}else if(b<8)
		{
	 		if(b%3==0)
			{
				cout<<"31";
			} 
		}else if(b>7)
		{
			if(b%2==0)
			{
				cout<<"30";
			}
		}
	}
	return 0;
}

/**************************************************************
	Problem: 2096
	User: lzc
	Language: C++
	Result: Wrong Answer
****************************************************************/