mod = 1000000007
eps = 10**-9


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

    # comb init
    nmax = 2 * 10 ** 5 + 10  # change here
    fac = [0] * nmax
    finv = [0] * nmax
    inv = [0] * nmax
    fac[0] = 1
    fac[1] = 1
    finv[0] = 1
    finv[1] = 1
    inv[1] = 1
    for i in range(2, nmax):
        fac[i] = fac[i - 1] * i % mod
        inv[i] = mod - inv[mod % i] * (mod // i) % mod
        finv[i] = finv[i - 1] * inv[i] % mod

    def comb(n, r):
        if n < r:
            return 0
        else:
            return (fac[n] * ((finv[r] * finv[n - r]) % mod)) % mod

    N, MP, MQ, L = map(int, input().split())
    S = list(map(int, input().split()))

    dp = [[0] * (MQ+1) for _ in range(N+1)]
    dp[0][0] = 1
    for s in S:
        dp_new = [[0] * (MQ+1) for _ in range(N+1)]
        cs = [[0] * (MQ+2) for _ in range(N+1)]
        for n in range(N+1):
            for j in range(MQ+1):
                cs[n][j+1] = (cs[n][j] + dp[n][j])%mod
        for n in range(N+1):
            for j in range(MQ+1):
                # use q
                if n:
                    dp_new[n][j] = (dp_new[n][j] + (cs[n-1][j] - cs[n-1][max(0, j - s)])%mod)%mod
                # don't use q
                dp_new[n][j] = (dp_new[n][j] + dp[n][j])%mod
        dp = dp_new
    ans = 0
    for n in range(N+1):
        for j in range(MQ+1):
            p_need = n * L - j
            if p_need <= MP:
                ans = (ans + (comb(MP - p_need + N-1, N-1) * dp[n][j])%mod)%mod
    print(ans)


if __name__ == '__main__':
    main()