import sys
input = sys.stdin.readline

N, K, X, Y = map(int, input().split())
A = list(map(int, input().split()))
A = set(A)
dp = [[0]*1024 for _ in range(N+1)]
dp[0][0] = 1
MOD = 998244353

for i in range(N):
    for j in range(1024):
        for Ai in A:
            dp[i+1][j^Ai] += dp[i][j]
            
        if i-1==0:
            dp[i+1][j^Ai] -= dp[i-1][j^Ai]*len(A)
        elif i-1>0:
            dp[i+1][j^Ai] -= dp[i-1][j^Ai]*(len(A)-1)
            
        dp[i+1][j^Ai] %= MOD

print(sum(dp[N][X:Y+1])%MOD)