#include<bits/stdc++.h>
#define int long long
using namespace std;
int n;
string add(string s,int v)
{
	string t="",t1=s;
	for(;v;v/=9,t1="9["+t1+"]")
	{
		if(v%9==1)t=t+t1;
		if(v%9==2)t=t+"2["+t1+"]";
		if(v%9==3)t=t+"3["+t1+"]";
		if(v%9==4)t=t+"4["+t1+"]";
		if(v%9==5)t=t+"5["+t1+"]";
		if(v%9==6)t=t+"6["+t1+"]";
		if(v%9==7)t=t+"7["+t1+"]";
		if(v%9==8)t=t+"8["+t1+"]";
	}
	return t;
}
string work(int n)
{
	if(n==1)return "AE";
	if(n==2)return "AEACAEE";
	if(n%2==0)return add("A",n)+add("EC",n-1)+"E"+work(n-1);
	int a=(n-1)/2;
	string t=work(a);
	string s=add("AC",a)+"A";
	string s1=add("CE",a)+"C"+add("A",a+1);
	string s2=add("E",n);
	return add(t,2)+s+add(s1,a)+s2;
}
signed main()
{
	cin>>n;
	cout<<work(n);
	cout<<add("C",n);
	return 0;
}
/*
*/