#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;
typedef vector<ll> VI;
typedef vector<VI> VVI;
#define REP(i,n) for(int i=0;i<n;i++)
#define ALL(v) v.begin(),v.end()
constexpr ll MOD=998244353;
constexpr ll INF=1e18;

int main(){
	int n, k, x, y;
	cin >> n >> k >> x >> y;
	set<int> st; int a;
	REP(i,k){
		cin >> a;
		st.insert(a);
	}
	ll dp[45][1024]={0};
	dp[0][0]=1;
	REP(i,n){
		REP(j,1024){
			for(int x:st){
				REP(k,n){
					if(k%2==0)
						dp[i+1+k][j^x]=(dp[i+1+k][j^x]+dp[i][j])%MOD;
					else
						dp[i+1+k][j]=(dp[i+1+k][j]+MOD-dp[i][j])%MOD;
				}
			}
		}
	}
	ll ans=0;
	for(int i=x;i<=y;i++){
		ans=(ans+dp[n][i])%MOD;
	}
	cout << ans << endl;
	return 0;
}