#include<bits/stdc++.h>
using namespace std;
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);
    }
}
int main()
{
    cin >> n;
    f(n,'A','B','C');
    return 0;
}
/**************************************************************
	Problem: 1222
	User: yangwanning
	Language: C++
	Result: Compile Error
****************************************************************/