#include <fstream>

using namespace std;

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

const int smax= 10000;

int d[smax+1];

int main(  ) {
    int n, g;
    fin>>n>>g;
    int sol= 0;
    for ( int i= 0; i<n; ++i ) {
        int w, p;
        fin>>w>>p;
        for ( int j= g-w; j>=0; --j ) {
            if ( d[j+w]<d[j]+p ) {
                d[j+w]= d[j]+p;
                if ( d[j+w]>sol ) {
                    sol= d[j+w];
                }
            }
        }
    }
    fout<<sol<<"\n";

    return 0;
}