#include <bits/stdc++.h>

using namespace std;

template<typename T,T MOD>
struct mod_int{
  T v;
  mod_int(): v(0) {}
  mod_int(T t) { v=t%MOD; if(v<0) v+=MOD; }
  
  mod_int inv() const {
    T a=v, b=MOD, u=1, v=0;
		while (b>0) { T t=a/b; a-=t*b; swap(a,b); u-=t*v; swap(u,v); }
		return u;
  }
  
  mod_int pow(long long p) const {
    mod_int ret = 1, base(v);
    while (p > 0) {
      if (p & 1)
        ret *= base;
      base *= base;
      p >>= 1;
    }
    return ret;
  }
  
  mod_int& operator+=(const mod_int &a) { v+=a.v; if(v>=MOD)v-=MOD; return *this; }
  mod_int& operator-=(const mod_int &a) { v+=MOD-a.v; if(v>=MOD)v-=MOD; return *this; }
  mod_int& operator*=(const mod_int &a) { v=v*a.v%MOD; return *this; }
  mod_int& operator/=(const mod_int &a) { return (*this)*=a.inv(); }
  
  mod_int operator+(const mod_int &a) const { return mod_int(v)+=a; }
  mod_int operator-(const mod_int &a) const { return mod_int(v)-=a; }
  mod_int operator*(const mod_int &a) const { return mod_int(v)*=a; }
  mod_int operator/(const mod_int &a) const { return mod_int(v)/=a; }
  
  friend mod_int operator+(T x, const mod_int& m) { return mod_int(x)+m; }
  friend mod_int operator-(T x, const mod_int& m) { return mod_int(x)-m; }
  friend mod_int operator*(T x, const mod_int& m) { return mod_int(x)*m; }
  friend mod_int operator/(T x, const mod_int& m) { return mod_int(x)/m; }
  
  mod_int operator-() const{ return v?mod_int(MOD-v):mod_int(v); }
  
  bool operator==(const mod_int &a) const { return v==a.v; }
  bool operator!=(const mod_int &a) const { return v!=a.v; }
  bool operator<(const mod_int &a) const { return v <a.v; }
  
	friend istream& operator>>(istream& is, mod_int& m){ T t; is>>t; m=mod_int(t); return is; }
	friend ostream& operator<<(ostream& os,const mod_int& m){ return os<<m.v; }
};

using mint = mod_int<long long, 998244353>;

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  
  int n, k, x, y;
  cin >> n >> k >> x >> y;

  vector<int> a(k);
  for (int i = 0; i < k; i++)
    cin >> a[i];

  vector<vector<mint> > cur(1024, vector<mint>(k+1));
  cur[0][k] = 1;
  for (int t = 0; t < n; t++) {
    vector<vector<mint> > nxt(1024, vector<mint>(k+1));
    for (int i = 0; i < 1024; i++) {
      mint sum = 0;
      for (int j = 0; j <= k; j++)
        sum += cur[i][j];
      for (int j = 0; j < a.size(); j++) {
        nxt[i^a[j]][j] += sum - cur[i][j];
      }
    }
    cur = nxt;
  }
  
  mint ret = 0;
  for (int i = x; i <= y; i++) {
    for (int j = 0; j <= k; j++)
      ret += cur[i][j];
  }
  cout << ret << endl;

  return 0;
}