#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;
	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: 1222
	User: zhuanghaoxiang
	Language: C++
	Result: Compile Error
****************************************************************/