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// Author: Kajetan Ramsza
#include "bits/stdc++.h"

using namespace std;

template<typename F, typename S> ostream& operator<<(ostream& os, const pair<F, S> &p) { return os<<"("<<p.first<<", "<<p.second<<")"; }
template<typename T> ostream &operator<<(ostream & os, const vector<T> &v) { os << "{"; typename vector< T > :: const_iterator it;
    for( it = v.begin(); it != v.end(); it++ ) { if( it != v.begin() ) os << ", "; os << *it; } return os << "}"; }

void dbg_out() { cerr<<'\n'; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr<<' '<<H; dbg_out(T...); }

#ifdef DEBUG
#define dbg(...) cerr<<"(" << #__VA_ARGS__ <<"):", dbg_out(__VA_ARGS__)
#else
#define dbg(...) 
#endif

typedef long long ll;

string rotate_120(string s) {
	int n = s.size();
	for(int i=0;i<n;i++) {
		if(s[i] - 'A' < 6 && s[i] - 'A' >= 0) {
			s[i] = (s[i] - 'A' + 2) % 6 + 'A';
		}
	}
	return s;
}

string repeat(ll n, string s) {
	if(n == 0) return "";
	if(n == 1) return s;
	if(n < 10)
		return to_string(n)+"["+s+"]";
	return "9["+repeat(n/9, s)+"]"+repeat(n%9, s);
}

string triangle(ll n) {
	if(n == 1) {
		return "AE";
	}
	if(n % 2 == 0) {
		return "A"+repeat(n-1,"EA")+rotate_120(triangle(n-1))+repeat(n,"E");
	}
	string res = "A";
	res += repeat(n/2, repeat(n/2, "A")+repeat(n/2-1, "EC")+"E");
	res += repeat(n/2, "C");
	res += repeat(n-1, "EA");
	res += repeat(2, rotate_120(triangle(n/2)));
	res += repeat(n, "E");
	return res;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	// ll n = ll(1e18) ;
	ll n;
	cin>>n;
	cout<<triangle(n)+repeat(n,"C")<<'\n';
}