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#include <bits/stdc++.h>

using namespace std;

using ll = long long;


class Action {
public:
  virtual ~Action() {}
  virtual void run() = 0;
  virtual bool isMove() = 0;
};

class Move : public Action {
  int x, y;
public:
  Move(int _x, int _y) : x(_x), y(_y) {}

  void run() {
    if (x == 1 && y == 0) printf("A");
    else if (x == 1 && y == -1) printf("B");
    else if (x == 0 && y == -1) printf("C");
    else if (x == -1 && y == 0) printf("D");
    else if (x == -1 && y == 1) printf("E");
    else if (x == 0 && y == 1) printf("F");
    else abort();
  }
  bool isMove() { return true; }
};

class Sequence : public Action {
  vector<Action*> actions;
public:
  Sequence() : actions() {}
  Sequence(const vector<Action*> &_actions) : actions(_actions) {}
  ~Sequence() {
    for (auto action : actions) {
      if (!action->isMove()) delete action;
    }
  }

  void run() {
    for (auto action : actions) action->run();
  }
  bool isMove() { return false; }

  void append(Action *action) {
    actions.push_back(action);
  }
};

class Repeat : public Action {
  Action *action;
  ll n;
public:
  Repeat(Action *_action, ll _n) : action(_action), n(_n) {}
  ~Repeat() {
    if (!action->isMove()) delete action;
  }

  void run() {
    ll m = n;
    int i = 0;
    while (m > 0) {
      if (m % 9 == 1) {
        action->run();
      } else if (m % 9 > 0) {
        printf("%lld", m % 9);
        if (!action->isMove()) printf("[");
        action->run();
        if (!action->isMove()) printf("]");
      }
      m /= 9;
      if (m > 0) {
        i++;
        printf("9[");
      }
    }
    for (int j = 0; j < i; j++) printf("]");
  }
  bool isMove() { return false; }
};


Move *L, *R, *U, *D, *DR, *UL;



// starts and ends in top corner
void makeTriangle(ll size, Sequence *out);
// without left and bottom border, starts in top corner, ends in right corner
void makeBorderlessTriangle(ll size, Sequence *out);
// starts in bottom-right corner, ends in top-left corner
void makeSquare(ll size, Sequence *out);


void makeTriangle(ll size, Sequence *out) {
  if (size == 1) {
    out->append(DR);
    out->append(L);
    out->append(U);
  } else {
    Sequence *half = new Sequence();
    makeBorderlessTriangle(size / 2, half);
    out->append(new Repeat(half, 2));
    if (size % 2 == 1) {
      out->append(DR);
      out->append(new Repeat(L, size));
      out->append(U);
      out->append(new Repeat(new Sequence({ DR, U }), size - 1));
    }
    out->append(new Repeat(L, size / 2));
    makeSquare(size / 2, out);
    out->append(new Repeat(U, size / 2));
  }
}

void makeBorderlessTriangle(ll size, Sequence *out) {
  if (size == 1) {
    out->append(DR);
  } else if (size == 2) {
    out->append(DR);
    out->append(L);
    out->append(DR);
    out->append(U);
    out->append(DR);
  } else {
    out->append(DR);
    makeTriangle(size - 2, out);
    out->append(new Repeat(new Sequence({ L, DR }), size - 1));
    out->append(new Repeat(new Sequence({ U, DR }), size - 1));
  }
}

void makeSquare(ll size, Sequence *out) {
  Sequence *row = new Sequence();
  row->append(new Repeat(L, size));
  row->append(U);
  row->append(new Repeat(new Sequence({ DR, U }), size));
  out->append(new Repeat(row, size));
  out->append(new Repeat(L, size));
}


int main() {
  L = new Move(-1, 0);
  R = new Move(1, 0);
  D = new Move(0, -1);
  U = new Move(0, 1);
  DR = new Move(1, -1);
  UL = new Move(-1, 1);

  ll n;
  scanf("%lld", &n);
  Sequence *sequence = new Sequence();
  makeTriangle(n, sequence);
  sequence->run();
  //printf("%lld\n", sequence->size());
  puts("");
  delete sequence;
}