//                                                     (┬┬﹏┬┬)
#include <bits/stdc++.h>
using namespace std;
#define lli long long int

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif


    int n, mny;
    cin >> n >> mny;
    vector<int>pr(n), pg(n);

    for (int i = 0; i < n; ++i)
        cin >> pr[i];

    for (int i = 0; i < n; ++i)
        cin >> pg[i];

    vector<vector<int>> dp(n + 1, vector<int>(mny + 1, 0));


    for (int i = 1; i <= n; ++i)
    {
        for (int j = 0; j <= mny; ++j)
        {
            dp[i][j] = dp[i - 1][j];
            int lf = j - pr[i - 1];
            if (lf >= 0 ) {
                dp[i][j] = max(dp[i][j], pg[i - 1] + dp[i - 1][lf]);
            }
        }
    }

    cout << dp[n][mny];

}