#include <fstream>
#include <cmath>

using namespace std;

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

const int nMax = 5000 + 5;
const int gMax = 10000 + 5;

int n, G;

int dp[gMax], g[nMax], p[nMax];

void Citire()
{
    fin >> n >> G;

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

void Afisare(int maxim)
{
    fout << maxim;
}

void Rezolvare()
{
    int maxim = 0;

    for (int i = 1; i <= n; i++)
    {
        for (int j = G - g[i]; j >= 0; j--)
        {
            if (dp[j + g[i]] < dp[j] + p[i])
            {
                dp[j + g[i]] = dp[j] + p[i];  
            }
        }
    }

  

    for (int i = 1; i <= G; i++)
    {
        maxim = max(maxim, dp[i]);
    }

    Afisare(maxim);
}

int main()
{
    Citire();
    Rezolvare();

    fin.close();
    fout.close();
    return 0;
}