#include <bits/stdc++.h>
using namespace std;
const double eps = 1e-9;
int v[1024];
int vv[1024];
int N;
int try_it(int last) {
  for (int i = (0); i < (N); i++) vv[i] = v[i];
  for (int i = (last); i < (N); i++) vv[i] = max(0, vv[i] - 1);
  vv[N] = 0;
  int NN = N;
  while (NN > 0 && vv[NN - 1] == 0) --NN;
  int moves = 0, p = -1;
  while (vv[NN - 1] > 0) {
    moves += 3;
    ++p;
    while (vv[p + 1] >= vv[p]) {
      moves += 2;
      ++p;
    }
    ++moves;
    --vv[p];
    --p;
    while (p >= 0 && vv[p] == vv[p + 1] + 1) {
      --vv[p];
      --p;
      moves++;
    }
    moves++;
  }
  return moves + N * 3 - 2 * p - last;
}
void do_it(int last) {
  for (int i = (0); i < (N); i++) vv[i] = v[i];
  for (int i = (last); i < (N); i++) vv[i] = max(0, vv[i] - 1);
  vv[N] = 0;
  int NN = N;
  while (NN > 0 && vv[NN - 1] == 0) --NN;
  int p = -1;
  while (vv[NN - 1] > 0) {
    cout << "ARA";
    ++p;
    while (vv[p + 1] >= vv[p]) {
      cout << "RA";
      ++p;
    }
    cout << "L";
    --vv[p];
    --p;
    while (p >= 0 && vv[p] == vv[p + 1] + 1) {
      --vv[p];
      --p;
      cout << "L";
    }
    cout << "A";
  }
  while (p++ < N - 1) cout << "AR";
  cout << "A";
  while (p-- > last) cout << "L";
  cout << "A\n";
}
int main() {
  ios::sync_with_stdio(false);
  cin >> N;
  for (int i = (0); i < (N); i++) cin >> v[i];
  v[N] = 0;
  while (N > 0 && v[N - 1] == 0) --N;
  int best = try_it(0);
  int last = 0;
  for (int i = (1); i < (N); i++) {
    int c = try_it(i);
    if (c < best) {
      best = c;
      last = i;
    }
  }
  do_it(last);
  return 0;
}
