fun main() {
    val builder = StringBuilder()

    val mod = 1000000007L

    val (n, m) = readInputLine().split(" ").map { it.toInt() }

    // value -> cnt
    val vCnt = Array(n) { mutableMapOf<Long, Long>() }
    val rCnt = Array(m) { mutableMapOf<Long, Long>() }

    readInputLine().split(" ").forEachIndexed { index, s ->
        val v = s.toLong()
        if (index != 0) {
            vCnt[index - 1].forEach {
                vCnt[index][it.key] = ((vCnt[index][it.key] ?: 0L) + it.value) % mod
                vCnt[index][it.key + v] = ((vCnt[index][it.key + v] ?: 0L) + it.value) % mod
            }
        }
        vCnt[index][v] = (vCnt[index][v] ?: 0L) + 1L
    }

    readInputLine().split(" ").forEachIndexed { index, s ->
        val r = s.toLong()
        if (index != 0) {
            rCnt[index - 1].forEach {
                rCnt[index][it.key] = ((rCnt[index][it.key] ?: 0L) + it.value) % mod
                rCnt[index][it.key + r] = ((rCnt[index][it.key + r] ?: 0L) + it.value) % mod
            }
        }
        rCnt[index][r] = (rCnt[index][r] ?: 0L) + 1L
    }

    val (a, b) = readInputLine().split(" ").map { it.toLong() }

    var ans = 0L

    val vCntSum = LongArray(100000 + 1)

    vCnt[n - 1].forEach { entry ->
        vCntSum[entry.key.toInt()] = entry.value
    }

    for (i in 1..100000) {
        vCntSum[i] = (vCntSum[i] + vCntSum[i - 1]) % mod
    }

    rCnt[m - 1].forEach { entry ->
        val l = entry.key * a
        val r = entry.key * b
        ans = (ans + (vCntSum[r.toInt()] - vCntSum[l.toInt() - 1]) * entry.value) % mod
    }

    builder.appendln(ans)

    print(builder.toString())
}

fun readInputLine(): String {
    return readLine()!!
}