#include<bits/stdc++.h>
#define int long long
using namespace std;
const int r=4;
string prt(string s,int x){
	string res;
	int t=1;
	for(;t<=x;t*=r); 
	for(;t>1;t/=r){
		if(res.size()>0) res="4["+res+"]";
		for(int j=1;j<=x/(t/r)%r;j++){
			res=res+s;
		}
	}
	return res;
}
void solve(int n){
	if(n<=2){
		if(n==1) printf("AE");
		else printf("AEACAEE");
		return;
	}
	int x=(n-1)/2;
	printf("2[");solve(x);printf("]");
	if(n-x*2==1){
		cout<<prt("AC",n-1);
	}
	else{
		cout<<"AE";
		cout<<prt("AC",n-1);
		cout<<prt("E",n-2);
		cout<<"C"<<prt("AC",n-3);
	}
	if(x==1) printf("EC");
	else{
	//	int sum=0; 
	//	sum+=prt(x-1);
	//	printf("%d[",x-1);
		string s;
		s=prt("E",x)+"C"+prt("AC",x-1);
		cout<<prt(s,x);
	/*	printf("C");
		printf("%d[AC]",x-1);
		printf("%d[E]",x);*/
	}
	cout<<prt("A",n-x)<<prt("E",n);
	
}
signed main(){
	int n;cin>>n;solve(n);
	cout<<prt("C",n);
}