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#include <iostream>
#include <string>

using namespace std;

int n = 0;
int n2 = 0;
string outCommand;

int main()
{
    cin >> n;
	n2 = n;
	int tempN0 = n2;
	while (tempN0 > 9)
	{
		outCommand.append(to_string(9));
		outCommand.append("A");
		tempN0 -= 9;
	}
	if (tempN0 != 1)
		outCommand.append(to_string(tempN0));
	outCommand.append("A");

	int tempN2 = n2;
	while (tempN2 > 9)
	{
		outCommand.append(to_string(9));
		outCommand.append("E");
		tempN2 -= 9;
	}
	if(tempN2 != 1)
		outCommand.append(to_string(tempN2));
	outCommand.append("E");

	int i = 0;
	while (i < n - 1)
	{
		n2--;
		int tempN = n2;
		while (tempN > 9)
		{
			outCommand.append(to_string(9));
			outCommand.append("[CA]");
			tempN -= 9;
		}
		if (tempN != 1)
		{
			outCommand.append(to_string(tempN));
			outCommand.append("[CA]");
		}
		else
			outCommand.append("CA");

		outCommand.append("C");

		int tempN1 = n2;
		while (tempN1 > 9)
		{
			outCommand.append(to_string(9));
			outCommand.append("E");
			tempN1 -= 9;
		}
		if (tempN1 != 1)
			outCommand.append(to_string(tempN1));
		outCommand.append("E");

		i++;
	}
	outCommand.append("C");

	cout << outCommand << endl;
}