import sys

import numpy as np

from numba import njit



read = sys.stdin.buffer.read

readline = sys.stdin.buffer.readline

readlines = sys.stdin.buffer.readlines



@njit('(i4[::1],i4,i8[::1])', cache=True)

def main(A, B, C):

    counts = np.zeros(1 << 18, np.int32)

    popcount = np.zeros(1 << B, np.int32)

    for i in range(B):

        popcount[1 << i:1 << i + 1] = popcount[:1 << i] + 1



    answer = 0

    for i in range(1 << B):

        k = popcount[i]

        t = 0

        for x in A & i:

            n = counts[x]

            counts[x] += 1

            t -= C[n]

            t += C[n + 1]

        for x in A & i:

            counts[x] = 0

        if k & 1:

            t = -t

        answer += t

    return answer



N, K, S, T = list(map(int, readline().split()))

A = np.array(readline().split(), np.int32)



def convert_problem(S, T, A):

    ng = np.zeros(len(A), np.bool)

    B = np.zeros_like(A)

    n = 0

    for i in range(18):

        s, t = (S >> i) & 1, (T >> i) & 1

        if (s, t) == (0, 0):

            ng |= ((A >> i) & 1) == 1

        elif (s, t) == (1, 1):

            ng |= ((A >> i) & 1) == 0

        elif (s, t) == (1, 0):

            print((0))

            exit()

        else:

            B += ((A >> i) & 1) << n

            n += 1

    return B[~ng], n



A, B = convert_problem(S, T, A)



C = np.zeros((100, 100), np.int64)

C[0, 0] = 1

for n in range(1, 100):

    C[n, :-1] += C[n - 1, :-1]

    C[n, 1:] += C[n - 1, :-1]

C = C[:, 1:K + 1].sum(axis=1)



print((main(A, B, C)))
import sys

import numpy as np

from numba import njit



read = sys.stdin.buffer.read

readline = sys.stdin.buffer.readline

readlines = sys.stdin.buffer.readlines



@njit('(i4[::1],i4,i8[::1])', cache=True)

def main(A, B, C):

    counts = np.zeros(1 << 18, np.int32)

    popcount = np.zeros(1 << B, np.int32)

    for i in range(B):

        popcount[1 << i:1 << i + 1] = popcount[:1 << i] + 1



    answer = 0

    for i in range(1 << B):

        k = popcount[i]

        t = 0

        for x in A & i:

            n = counts[x]

            counts[x] += 1

            t -= C[n]

            t += C[n + 1]

        for x in A & i:

            counts[x] = 0

        if k & 1:

            t = -t

        answer += t

    return answer

  

if sys.argv[-1] == 'ONLINE_JUDGE':

    from numba.pycc import CC

    cc = CC('my_module')

    cc.export('main', '(i4[::1],i4,i8[::1])')(main)

    cc.compile()

    exit()

from my_module import main



N, K, S, T = list(map(int, readline().split()))

A = np.array(readline().split(), np.int32)



def convert_problem(S, T, A):

    ng = np.zeros(len(A), np.bool)

    B = np.zeros_like(A)

    n = 0

    for i in range(18):

        s, t = (S >> i) & 1, (T >> i) & 1

        if (s, t) == (0, 0):

            ng |= ((A >> i) & 1) == 1

        elif (s, t) == (1, 1):

            ng |= ((A >> i) & 1) == 0

        elif (s, t) == (1, 0):

            print((0))

            exit()

        else:

            B += ((A >> i) & 1) << n

            n += 1

    return B[~ng], n



A, B = convert_problem(S, T, A)



C = np.zeros((100, 100), np.int64)

C[0, 0] = 1

for n in range(1, 100):

    C[n, :-1] += C[n - 1, :-1]

    C[n, 1:] += C[n - 1, :-1]

C = C[:, 1:K + 1].sum(axis=1)



print((main(A, B, C)))
import sys
import numpy as np
from numba import njit

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


@njit("(i4[::1],i4,i8[::1])", cache=True)
def main(A, B, C):
    counts = np.zeros(1 << 18, np.int32)
    popcount = np.zeros(1 << B, np.int32)
    for i in range(B):
        popcount[1 << i : 1 << i + 1] = popcount[: 1 << i] + 1
    answer = 0
    for i in range(1 << B):
        k = popcount[i]
        t = 0
        for x in A & i:
            n = counts[x]
            counts[x] += 1
            t -= C[n]
            t += C[n + 1]
        for x in A & i:
            counts[x] = 0
        if k & 1:
            t = -t
        answer += t
    return answer


N, K, S, T = list(map(int, readline().split()))
A = np.array(readline().split(), np.int32)


def convert_problem(S, T, A):
    ng = np.zeros(len(A), np.bool)
    B = np.zeros_like(A)
    n = 0
    for i in range(18):
        s, t = (S >> i) & 1, (T >> i) & 1
        if (s, t) == (0, 0):
            ng |= ((A >> i) & 1) == 1
        elif (s, t) == (1, 1):
            ng |= ((A >> i) & 1) == 0
        elif (s, t) == (1, 0):
            print((0))
            exit()
        else:
            B += ((A >> i) & 1) << n
            n += 1
    return B[~ng], n


A, B = convert_problem(S, T, A)
C = np.zeros((100, 100), np.int64)
C[0, 0] = 1
for n in range(1, 100):
    C[n, :-1] += C[n - 1, :-1]
    C[n, 1:] += C[n - 1, :-1]
C = C[:, 1 : K + 1].sum(axis=1)
print((main(A, B, C)))

import sys
import numpy as np
from numba import njit

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


@njit("(i4[::1],i4,i8[::1])", cache=True)
def main(A, B, C):
    counts = np.zeros(1 << 18, np.int32)
    popcount = np.zeros(1 << B, np.int32)
    for i in range(B):
        popcount[1 << i : 1 << i + 1] = popcount[: 1 << i] + 1
    answer = 0
    for i in range(1 << B):
        k = popcount[i]
        t = 0
        for x in A & i:
            n = counts[x]
            counts[x] += 1
            t -= C[n]
            t += C[n + 1]
        for x in A & i:
            counts[x] = 0
        if k & 1:
            t = -t
        answer += t
    return answer


if sys.argv[-1] == "ONLINE_JUDGE":
    from numba.pycc import CC

    cc = CC("my_module")
    cc.export("main", "(i4[::1],i4,i8[::1])")(main)
    cc.compile()
    exit()
from my_module import main

N, K, S, T = list(map(int, readline().split()))
A = np.array(readline().split(), np.int32)


def convert_problem(S, T, A):
    ng = np.zeros(len(A), np.bool)
    B = np.zeros_like(A)
    n = 0
    for i in range(18):
        s, t = (S >> i) & 1, (T >> i) & 1
        if (s, t) == (0, 0):
            ng |= ((A >> i) & 1) == 1
        elif (s, t) == (1, 1):
            ng |= ((A >> i) & 1) == 0
        elif (s, t) == (1, 0):
            print((0))
            exit()
        else:
            B += ((A >> i) & 1) << n
            n += 1
    return B[~ng], n


A, B = convert_problem(S, T, A)
C = np.zeros((100, 100), np.int64)
C[0, 0] = 1
for n in range(1, 100):
    C[n, :-1] += C[n - 1, :-1]
    C[n, 1:] += C[n - 1, :-1]
C = C[:, 1 : K + 1].sum(axis=1)
print((main(A, B, C)))

+if sys.argv[-1] == "ONLINE_JUDGE": +    from numba.pycc import CC + +    cc = CC("my_module") +    cc.export("main", "(i4[::1],i4,i8[::1])")(main) +    cc.compile() +    exit() +from my_module import main +