#include <iostream>
#include <fstream>
#include <utility>
#include <vector>
using namespace std;
vector<pair<int, int> > Ob;
int nrO, G, a, b, pMax;

int main()
{
    freopen("rucsac.in", "rt", stdin);
    freopen("rucsac.out", "wt", stdout);
    scanf("%d%d", &nrO, &G);
    Ob.push_back(make_pair(0, 0));
    for(int i=1; i<=nrO; ++i){
        scanf("%d%d", &a, &b);
        Ob.push_back(make_pair(a, b));
    }
    vector<int>D1(G+1), D2(G+1);
    for(int o=1; o<=nrO; ++o){
        D1.swap(D2);
        for( int g=0; g<=G; ++g){
            D2[g] = D1[g];
            if(Ob[o].first <= g)
                D2[g] = max(D2[g], (D1[g - Ob[o].first] + Ob[o].second) );
        }
    }
    for(int i=0; i<=G; ++i)
        pMax = max(pMax, D2[i]);
    cout<<pMax<<'\n';
}