import java.util.*;

public class Main {
    static int N,W;
    static int pow(int n){
        int res = 1;
        for(int i = 0; i < n ; i ++){
            res *= 2;
        }
        return res;
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        N = sc.nextInt();
        int[] a = new int[N];
        int[] c = new int[N];
        W = sc.nextInt();
        for(int i = 0; i < N ; i ++){
            a[i] = sc.nextInt();
        }
        for(int i = 0; i < N; i ++){
            c[i] = sc.nextInt();
        }
        int ans = 0;
        ArrayList<Integer> ansList = new ArrayList<>();
        for(int i = 0; i < pow(N); i ++){
            int cost = 0;
            int weight = 0;
            ArrayList<Integer> list = new ArrayList<>();
            for(int j = 0; j < N; j ++){
                if(((i>>j) & 1) == 1){
                    cost += c[j];
                    weight += a[j];
                    list.add(j+1);
                }
            }
            if(!(weight>W)){
                if(ans < cost){
                    ansList = list;
                    ans = cost;
                }
            }
        }
        System.out.println(ansList.size());
        for(int i = 0; i < ansList.size(); i++){
            System.out.print(ansList.get(i) + " ");
        }
    }
}