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#include <bits/stdc++.h>
using namespace std;
 
using ll = long long;
using db = long double;
using ull = unsigned long long;
 
using pi = pair<int, int>;
using pl = pair<ll, ll>;
 
using vi = vector<int>;
using vl = vector<ll>;
using vpi = vector<pi>;
using vpl = vector<pl>;
 
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
 
#define sz(x) int((x).size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define rep(i,a,b) for(int i = (a); i < (b); i++)
#define rrep(i,a,b) for(int i = (b) - 1; i >= (a); i--)
 
const db PI = acos(-1);
mt19937_64 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
 
tcT> bool ckmin(T& a, const T& b) { return b < a ? a=b, 1 : 0; }
tcT> bool ckmax(T& a, const T& b) { return a < b ? a=b, 1 : 0; }
 
tcT> void _dbg(const char *sdbg, T h){ cerr<<sdbg<<'='<<h<<endl; }
tcT, class... TA> void _dbg(const char *sdbg, T h, TA... a) {
	while(*sdbg!=',') cerr<<*sdbg++;
	cerr<<'='<<h<<','; _dbg(sdbg+1, a...);
}
 
tcT> ostream &operator<<(ostream& os, vector<T> V) {
	os << "["; for (auto vv : V) os << vv << ","; return os << "]";
}
tcT, class V> ostream &operator<<(ostream &os, pair<T,V> P) {
	return os << "(" << P.f << "," << P.s << ")";
}
 
#ifdef LOCAL
#define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (__VA_ARGS__)
#define cerr if(0)cout
#endif

string multiply(const string& s, ll k) {
	if (k == 0) return "";
	if (k == 1) return s;

	string res = "";

	if (k < 10) {
		res.pb('0' + k);
		if (sz(s) == 1) {
			res += s;
		}
		else {
			res.pb('[');
			res += s;
			res.pb(']');
		}
		return res;
	}

	for (ll x = 9; x > 1; x--) {
		if (k % x == 0) {
			res.pb('0' + x);
			res.pb('[');
			res += multiply(s, k/x);
			res.pb(']');
			return res;
		}
	}

	return multiply(s, k%9) + multiply(s, k - (k%9));
}

string downline(ll n) {
	return multiply("C", n);
}

string rightline(ll n) {
	return multiply("A", n);
}

string leftzigzag(ll n) { // < \|\|\|
	return multiply("CE", n);
}

string upzigzag(ll n) {
	return multiply("EA", n);
}

// wystaje jeden z dołu
string square(ll n) {
	string row = rightline(n) + "E" + leftzigzag(n-1);
	return multiply(row, n) + downline(n+1);
}

string column(ll n) {
	return downline(n) + "A" + upzigzag(n-1);
}

string triangle(ll n) {
	string res;
	if (n == 0) return "";
	else if (n == 1) return "CA";
	if (n % 2 == 1) {
		string rec = triangle(n/2);
		string res = multiply(rec, 2);
		res += leftzigzag(n-1);
		res += square(n/2);
		res += rightline(n);
		return res;
	}
	else {
		return column(n) + triangle(n-1);
	}
}

string ans = "";

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(nullptr);

	ll n;
	cin >> n;

	ans = triangle(n);
	ans += multiply("E", n);

	// debug(sz(ans));

	// map<char, int> occ;
	// for (char c : ans) occ[c]++;
	// for (auto [c, cnt] : occ) {
	// 	debug(c, cnt);
	// }

	cout << ans << "\n";

	return 0;
}