#include<bits/stdc++.h>
using namespace std;
void dfs(int s,char a,char b,char c){
	if(s>0){
	    dfs(s-1,a,c,b);
		cout<<a<<"To"<<c<<endl;
		dfs(s-1,b,a,c);	
	}
}
int main(){
	int n;
	cin>>n;
	dfs(n,'A','B','C');
	return 0;
}

/**************************************************************
	Problem: 1222
	User: linyuhang
	Language: C++
	Result: Wrong Answer
****************************************************************/