using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, m) = (c[0], c[1]);
        var a = NList;
        var p = NList;
        WriteLine(Order(n, m, a, p));
    }
    static string Order(int n, int m, int[] a, int[] p)
    {
        var visited = new bool[n + 1, m + 1];
        visited[0, 0] = true;
        for (var i = 0; i < n; ++i) for (var j = 0; j <= m; ++j)
        {
            if (visited[i, j])
            {
                visited[i + 1, j] = true;
                if (j + a[i] <= m) visited[i + 1, j + a[i]] = true;
            }
        }
        if (!visited[n, m])
        {
            return "-1";
        }
        var next = new int[n + 1][];
        for (var i = 0; i < next.Length; ++i) next[i] = Enumerable.Repeat(-1, m + 1).ToArray();
        next[n][m] = 0;
        for (var j = m; j >= 0; --j) for (var i = n; i > 0; --i)
        {
            if (!visited[i, j]) continue;
            if (next[i][j] < 0) continue;
            if (visited[i - 1, j])
            {
                if (next[i - 1][j] == -1) next[i - 1][j] = next[i][j];
                else if (j < m && p[next[i - 1][j]] > p[next[i][j]]) next[i - 1][j] = next[i][j];
            }
            if (j - a[i - 1] >= 0 && visited[i - 1, j - a[i - 1]])
            {
                if (next[i - 1][j - a[i - 1]] == -1) next[i - 1][j - a[i - 1]] = i - 1;
                else if (p[next[i - 1][j - a[i - 1]]] > p[next[i][j]]) next[i - 1][j - a[i - 1]] = i - 1;
            }
        }
        var ans = new List<int>();
        var x = 0;
        var y = 0;
        while (y < m)
        {
            var b = next[x][y];
            ans.Add(b + 1);
            x = b + 1;
            y += a[b];
        }
        return $"{ans.Count}\n{string.Join(" ", ans)}";
    }
}