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#include <chrono>
#include <cassert>
#include <string>
#include <array>
#include <deque>
#include <map>
#include <queue>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <iterator>
#include <algorithm>
#include <cmath>
#include <complex>
#include <numeric>
#include <random>
#include <ios>
#include <iostream>
#include <bitset>
using namespace std; 

#define fwd(i, a, b) for (int i = (a); i < (b); ++ i)
#define rep(i, n) for (int i = 0; i < (n); ++ i)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)x.size())
#define st first
#define nd second
#define pii pair<int, int>
#define vi vector<int>
#define fastio ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define int long long
#define ll long long

#ifdef LOCAL
template<typename Stream, typename T1, typename T2>
Stream& operator << (Stream& out, pair<T1, T2> a) {return out << "(" << a.st << ", " << a.nd << ")";}
 
template<typename Stream, typename T>
Stream &operator << (Stream& out, T v) {
	out << "{";
	int i = 0;
	for (auto x : v)
		out << x << ((++ i) != sz(v) ? ", " : "");
	return out << "}";
}

template<typename... Args>
void dump(Args... x) {((cerr << x << ", "), ...) << '\n';}
 
#define debug(x...) cerr << "[" #x "]: ", dump(x)
#else
#define debug(...) 0
#endif

string mul(string s, int k) {
	if (k == 0)
		return "";
	string dig;
	while (k) {
		dig.push_back((char)'0' + k % 9);
		k /= 9;
	}
	reverse(all(dig));
	string ans;
	rep(i, sz(dig)) {
		if (sz(ans))
			ans = "9[" + ans + "]";
		if (dig[i] != '0') {
			ans.push_back(dig[i]);
			ans += "[";
			ans += s;
			ans += "]";
		}
	}
	return ans;
}

string twoplusone(string s, int n) {
	s = mul(s, 2);
	s += mul("C", n);
	s += mul("A", n);
	s += mul("C", n);
	string col = mul("EA", n - 1) + "E" + mul("C", n);
	s += mul(col, n);
	col = mul("EA", 2 * n) + "E";
	s += col;
	return s;
}

string twoplustwo(string s, int n) {
	string ans = twoplusone(s, n);
	ans += mul("C", 2 * n + 1);
	string col = mul("EA", 2 * n + 1) + "E";
	ans += col;
	return ans;
}

string finish(string s, int n) {
	s += mul("C", n);
	s += mul("A", n);
	return s;
}

int32_t main() {
	fastio;
	int n;
	cin >> n;
	if (n == 1) {
		cout << "AEC\n";
		return 0;
	}
	if (n == 2) {
		cout << "AAECEAECC\n";
		return 0;
	}
	vi moves;
	while (n > 2) {
		if (n & 1) {
			moves.push_back(1);
			n /= 2;
		} else {
			moves.push_back(2);
			n /= 2;
			-- n;
		}
	}
	string ans;
	if (n == 1)
		ans = "E";
	else
		ans = "ECEAE";
	reverse(all(moves));
	rep(i, sz(moves))
		if (moves[i] == 1) {
			ans = twoplusone(ans, n);
			n = n * 2 + 1;
		} else {
			ans = twoplustwo(ans, n);
			n = n * 2 + 2;
		}
	cout << finish(ans, n) << '\n';
	return 0;
}