#include<bits/stdc++.h>
using namespace std;
int n;
int main()
{
	cin>>n;
	if(n==1)cout<<"B";
	else if(n==2)cout<<"A";
	else if(n==3)cout<<8;
	else if(n==4)cout<<50;
	else cout<<"6,5,4,3,2,1,";
	return 0;
}