#include <bits/stdc++.h>
using namespace std;
template <class c>
struct rge {
  c b, e;
};
template <class c>
rge<c> range(c i, c j) {
  return rge<c>{i, j};
}
template <class c>
auto dud(c* x) -> decltype(cerr << *x, 0);
template <class c>
char dud(...);
struct debug {
  template <class c>
  debug& operator<<(const c&) {
    return *this;
  }
};
const long long int N = 1e5 + 5;
long long int mod = 998244353;
long long int dx[4] = {0, 0, +1, -1};
long long int dy[4] = {+1, -1, 0, 0};
void solve() {
  long long int n;
  cin >> n;
  string s;
  cin >> s;
  vector<long long int> v(10, 0);
  for (long long int i = 0; i < (long long int)s.size(); i++) {
    if (s[i] == 'L') {
      for (long long int j = 0; j < 10; j++) {
        if (v[j] == 0) {
          v[j] = 1;
          break;
        }
      }
    } else if (s[i] == 'R') {
      for (long long int j = 9; j >= 0; j--) {
        if (v[j] == 0) {
          v[j] = 1;
          break;
        }
      }
    } else {
      long long int yo = s[i] - '0';
      v[yo] = 0;
    }
  }
  for (long long int i = 0; i < (long long int)v.size(); i++) cout << v[i];
}
int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long int t = 1;
  while (t--) solve();
  return 0;
}
