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#include <bits/stdc++.h>

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

using namespace std;


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

string generate_romb(ll n){
	ll x = (n+1)/2;
	ll y = n-x;
	
	string res = duplicate_command(duplicate_command("AE", x)+'A'+duplicate_command("C", x), y);
	return res;
}

string generate_traingle(ll n){
	if (n <= 0)
		return "";
	if (n == 1)
		return "AEC";
	if (n == 2)
		return "2A2ECACEC";
	if (n==3)
		return "3F3BD2E2[AC]DFDBD";

	string res = generate_romb(n);
	res += duplicate_command("A", (n+1)/2);
	if (n%2==1)
		res += 'E'+duplicate_command("CE", n/2)+duplicate_command("A", n/2);
	res += "2[";
	res += 'E'+duplicate_command("CE", n/2-1)+'A';
	res += generate_traingle(n/2-2)+duplicate_command("EA", n/2 - 2)+"E";
	res += ']';
	res += duplicate_command("C", n);
	return res;
}


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

	ll n;
	cin >> n;

	string ans =  generate_traingle(n);
	//cout << ans.size() << "\n";
	cout << ans << "\n";
}