#include <iostream>
#include <fstream>
#define Nmax 5001
#define Gmax 10001

using namespace std;
ifstream f("rucsac.in");
ofstream g("rucsac.out");

int n, G, w[Nmax], p[Nmax],sol, pr[Gmax][Nmax],l;

int main()
{
    f>>n>>G;
    for(int i=1;i<=n;i++)
    {
        f>>w[i]>>p[i];
    }
    for(int i=1;i<=n;i++)
    {
        for(int k=w[i];k<=G;k++)
        {
            for(int j=0;j<i;j++)
            {
                pr[k][i]=max(pr[k][i], pr[k-w[i]][j]+p[i]);
            }
            sol=max(sol, pr[k][i]);
        }
    }
    g<<sol;
}