#include <iostream>
#include <fstream>

using namespace std;

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

const int MAX_N = 5002;
const int MAX_W = 10002;

int n, g, d[MAX_W], w[MAX_N], p[MAX_N];

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

    for (int i = 1; i <= n; i++)
    {
        for (int j = g; j >= w[i]; j--)
        {
            d[j] = max(d[j], d[j - w[i]] + p[i]);
        }
    }
    fout << d[g];
    return 0;
}