#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
const int maxn=3e5+5;

string num[10]={"","1","2","3","4","5","6","7","8","9"};

string get(int x,string t) {
	if(x<=9) return num[x]+"["+t+"]";
	return "9["+get(x/9,t)+"]"+get(x%9,t);
}

string solve(int n) {
	if(n==1) return "AE";
	if(n==2) return "AEACA2E";
	string res="";
	int t=(n-1)/2, t2=t;
	if(n%2==0) ++t2;
	res+=get(2,solve(t));
	if(n%2==0) {
		res+=get(t,"AC");
		res+='A';
		res+=get(t,"E");
	}
	res+=get(t2,"AC");
	res=res+get(t,get(t2,"EC")+get(t2,"A")+"A"+get(n,"E"));
	return res;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	int n; cin>>n;
	string res=solve(n)+get(n,"C");
	cout<<res<<'\n';
	return 0;
}