#include<bits/stdc++.h>
using namespace std;
int n;
void f(int n,char q,char c,char z){
	if(n==1) cout<<q<<'To'<<z<<endl;
	else{
		f(n-1,q,z,c);
		cout<<q<<'To'<<z<<endl;
		f(n-1,c,q,z);
	}
}
int main(){
cin>>n;
f(n,'A','B','c');
	return 0;
}

/**************************************************************
	Problem: 1307
	User: caiqiaoxi
	Language: C++
	Result: Output Limit Exceed
****************************************************************/