#include <fstream>
#include <vector>
using namespace std;

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

int maxim(const int x, const int y)
{
    if(x>y)
        return x;
    return y;
}

struct obiect
{
    int w,p;
};

vector<obiect>obiecte;
int profit[10001];
int n,g;

void citire()
{
    int i;
    fin>>n>>g;

    obiecte.resize(n+2);
    //profit.resize(g+2);
    for(i=1;i<=n;i++)
    {
        fin>>obiecte[i].w>>obiecte[i].p;
    }

}

void dinamica()
{
    int i,j;
    for(i=1;i<=n;i++)
    {
        int greutate=obiecte[i].w;
        int profit_curent=obiecte[i].p;
        if(obiecte[i].w<=g)
        {
            for(j=g;greutate<=j;j--)
            {
                profit[j]=maxim(profit[j],profit[j-greutate]+profit_curent);
            }
            for(j;j>0;j--)
            {
                profit[j]=maxim(profit[j],profit[j-1]);
            }
        }
    }
}

int main()
{
    int i;
    citire();
    dinamica();
    fout<<profit[g];

    return 0;
}