#include <bits/stdc++.h>
using namespace std;
int main() {
  int T;
  cin >> T;
  int Deb = 0;
  int Fin = 9;
  int Tab[10];
  for (int j = 0; j < 10; j++) Tab[j] = 0;
  char Cuck;
  for (int j = 0; j < T; j++) {
    cin >> Cuck;
    if (Cuck == 'L') {
      Tab[Deb] = 1;
      int curDeb = Deb;
      while (Tab[curDeb] == 1 && curDeb < 10) curDeb++;
      Deb = curDeb;
    } else if (Cuck == 'R') {
      Tab[Fin] = 1;
      int curFin = Fin;
      while (Tab[curFin] == 1 && curFin >= 0) curFin--;
      Fin = curFin;
    } else {
      int Ind = Cuck - 48;
      Tab[Ind] = 0;
      int curDeb = 0;
      while (Tab[curDeb] == 1 && curDeb < 10) curDeb++;
      Deb = curDeb;
      int curFin = 9;
      while (Tab[curFin] == 1 && curFin >= 0) curFin--;
      Fin = curFin;
    }
  }
  for (int j = 0; j < 10; j++) cout << Tab[j];
}
