#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: 1222
	User: wuzhijing
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/