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

ll n;

void prnt(const string &s, ll x)
{
    if(x >= 9)
    {
        cout << "9[";
        prnt(s, x/9);
        cout << "]";
    }
    if(s.length() > 1)
    {
        if(x % 9 > 1)
            cout << x%9 << '[' << s << ']';
        if(x % 9 == 1)
            cout << s;
    }
    else
    {
        if(x % 9 > 1)
            cout << x%9 << s;
        if(x % 9 == 1)
            cout << s;
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie();
    cout.tie();
    cin >> n;
    for(int i=n; i>=4; i-=4)
    {
        prnt("A3[EA]3C", i-3);
        cout << "AEAEACCAEACA3E";
        prnt("EC", i-4);
        cout << "E";
    }
    if(n % 4 == 0)
    {
        prnt("C", n);
    }
    if(n % 4 == 1)
    {
        cout << "AE";
        prnt("C", n);
    }
    if(n % 4 == 2)
    {
        cout << "AEACAEE";
        prnt("C", n);
    }
    if(n % 4 == 3)
    {
        cout << "AEACAEACAEECEAE";
        prnt("C", n);
    }
    cout << "\n";
}