#include <bits/stdc++.h>

using namespace std;

ifstream fin ("rucsac.in");
ofstream fout ("rucsac.out");

void usain_bolt()
{
    ios::sync_with_stdio(false);
    fin.tie(0);
}

const int N_MAX = 1e4 + 5;
const int G_MAX = 1e6 + 5;

int main()
{
    usain_bolt();

    int N, G;

    fin >> N >> G;

    vector < int > w(N);
    vector < int > p(N);
    vector < vector < int > > dp(N, vector < int > (G + 1, 0));
    for(int i = 0; i < N; ++i) {
        fin >> w[i] >> p[i];
    }
    for(int i = 0; i < N; ++i) {
        for(int j = 0; j <= G; ++j) {
            if (i > 0) {
                dp[i][j] = dp[i - 1][j];
            } else {
                dp[i][j] = 0;
            }

            if(j >= w[i]) {
                if (i > 0) {
                    dp[i][j] = max(dp[i][j], dp[i - 1][j - w[i]] + p[i]);
                } else {
                    dp[i][j] = p[i];
                }
            }
        }
    }
    fout << dp[N - 1][G];
    return 0;
}