import com.sun.org.apache.xml.internal.utils.IntStack
import java.io.*
import java.util.*

class FastIO(private val inp: InputStream, private val out: OutputStream) : PrintWriter(out, false)
{
    private val reader = BufferedReader(InputStreamReader(inp))
    private var tokenizer = StringTokenizer("")

    fun get() : String?
    {
        while (!tokenizer.hasMoreTokens())
        {
            val s = reader.readLine() ?: return null
            tokenizer = StringTokenizer(s)
        }

        return tokenizer.nextToken()
    }

    fun getWord() : String = get()!!
    fun getInt() : Int = getWord().toInt()
    fun getLong() : Long = getWord().toLong()
    fun getDouble() : Double = getWord().toDouble()

    fun getLine() : String?
    {
        tokenizer = StringTokenizer("")
        return reader.readLine()
    }
}

fun main(args: Array<String>)
{
    FastIO(System.`in`, System.out).use {
        main(it)
    }
}

fun main(io: FastIO)
{
    val n = io.getInt()
    val m = io.getInt()

    val am = IntArray(n, {io.getInt()})
    val ac = IntArray(n, {io.getInt()})

    val d = Array(n, {IntArray(m + 1, {-1})})
    val p = Array(n, {IntArray(m + 1, {-1})})

    d[0] = 0

    // Перебор предметов
    for (j in 0 until n)
    {
        // Перебор положения предмета в массе
        for (i in m - am[j] downTo 0)
        {
            if (d[i] == -1) continue
            if (i + am[j] > m) continue

            if (d[i + am[j]] < d[i] + ac[j])
            {
                d[i + am[j]] = d[i] + ac[j]
                p[i + am[j]] = j
            }
        }
    }

    var maxV = 0
    var maxId = 0

    for (i in 0 until m)
    {
        if (maxV < d[i])
        {
            maxV = d[i]
            maxId = i
        }
    }

    val result = IntArray(n)
    var count = 0

    var cM = maxId
    var cI = p[maxId]

    while (cI >= 0)
    {
        result[count] = cI + 1
        count++

        cM -= am[cI]
        cI = p[cM]
    }

    io.println(count)

    for (i in count - 1 downTo 0)
    {
        io.print(result[i])
        io.print(' ')
    }
}