#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,X; cin >> N >> X;
    vector<int> V(N),W(N);
    for(auto &v : V) cin >> v;
    for(auto &w : W) cin >> w;

    vector<vector<int>> dp(N+1,vector<int>(X+1,0));
    for(int i=N; i>0; i--){
        int v = V.at(i-1),w = W.at(i-1);
        for(int k=0; k<=X-w; k++) dp.at(i-1).at(k+w) = max(dp.at(i-1).at(k+w),dp.at(i).at(k)+v);
        for(int k=0; k<=X; k++) dp.at(i-1).at(k) = max(dp.at(i-1).at(k),dp.at(i).at(k));
    }
    vector<int> answer;
    int now = dp.at(0).at(X);
    for(int i=0; i<N; i++){
        int v = V.at(i),w = W.at(i);
        if(dp.at(i+1).at(X) == dp.at(i).at(X)) continue;
        answer.push_back(i),X -= w;
    }
    cout << answer.size() << endl;
    for(auto a : answer) cout << a+1 << " "; cout << endl;
}