mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N, K, x, y = map(int, input().split())
    A = list(map(int, input().split()))
    A = list(set(A))
    K = len(A)
    
    assert K ** N <= 200000

    ans = 0
    for i in range(K ** N):
        B = []
        ii = i
        for j in range(N):
            B.append(ii % K)
            ii //= K
        ok = 1
        for j in range(N-1):
            if B[j] == B[j+1]:
                ok = 0
                break
        if ok:
            z = 0
            for b in B:
                z ^= A[b]
            if x <= z <= y:
                ans += 1
    print(ans)


if __name__ == '__main__':
    main()