#include <iostream>
#include <fstream>

using namespace std;

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

int n, g, w[5005], p[10005], din[2][10005];

void read()
{
    fin >> n >> g;
    for(int i = 1; i <= n; ++i)
        fin >> w[i] >> p[i];

    fin.close();
}

void debug()
{
    for(int i = 1; i <= n; ++i)
    {
        for(int cw = 0; cw <= g; ++cw)
            cout << din[i][cw] << ' ';
        cout << '\n';
    }
}

void dinamica()
{
    int l = 0;
    for(int i = 1; i <= n; ++i, l=1-l)
        for(int cw = 0; cw <= g; ++cw)
        {
            din[l][cw] = din[1-l][cw];

            if(w[i] <= cw)
                din[l][cw] = max(din[l][cw], din[1-l][cw-w[i]] + p[i]);
        }
    fout << din[1-l][g];
    fout.close();
}

int main()
{
    read();
    dinamica();
    //debug();
    return 0;
}