#include<bits/stdc++.h>

using namespace std;

using int64 = long long;
const int mod = 1e9 + 7;
// const int mod = 998244353;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;


template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
  os << p.first << " " << p.second;
  return os;
}

template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};

template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}

const int vy[] = {-1, 1, 0, 0};
const int vx[] = {0, 0, -1, 1};
const string vs = "UDLR";

int main() {
  int A, B;
  cin >> A >> B;
  string S;
  cin >> S;
  set< pair< int, int > > visited;
  visited.emplace(A, B);
  set< pair< int, int > > po;
  for(auto &t : S) {
    int d = vs.find(t);
    A += vy[d];
    B += vx[d];
    if(A < 0 || B < 0 || po.count(make_pair(A, B))) {
      A -= vy[d];
      B -= vx[d];
      continue;
    }
    if(!visited.count(make_pair(A, B)) && (d == 1 || d == 3)) {
      po.emplace(A, B);
      A -= vy[d];
      B -= vx[d];
    } else {
      visited.emplace(A, B);
    }
  }
  cout << -1 << endl;
  exit(0);
  if(A == 0 && B == 0) {
    po.emplace(100000, 100000);
    cout << po.size() << endl;
    for(auto &p : po) cout << p << endl;
  } else {
    cout << -1 << endl;
  }
}