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


	return 0;
}

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