#include <bits/stdc++.h>

using LL = long long;

std::string F(std::string s, LL x) {
    if (s.empty() || x == 0) return "";
    else if (x < 10) return std::to_string(x) + "[" + s + "]";
    else return "9[" + F(s, x / 9) + "]" + F(s, x % 9);
}

std::string Solve(LL n) {
    if (n & 1 ^ 1) return Solve(n - 1) + F("AC", n - 1) + "A" + F("E", n);
    std::string s;
    int mid = n / 2;
    s += F(Solve(mid), 2);
    s += F("AC", mid) + "A";
    s += F(F("CE", mid + 1) + F("A", mid +  1), mid);
    s += F("E", n);
    return s;
}

int main() {
    LL n;
    std::cin >> n;
    std::cout << Solve(n) + F("C", n);
    return 0;
}