#include <iostream>
#include <fstream>
#define DIM 5001
#define GR 10001

using namespace std;

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

typedef struct obiect{
    int greutate, profit;
}Obiect;


int main()
{
    int N, G;
    Obiect obiecte[DIM];
    fin >> N >> G;
    for(int i = 1; i <= N; i++)
        fin >> obiecte[i].greutate >> obiecte[i].profit;
    int vec[GR];
    vec[0] = 0;
    for(int i = 1; i <= N; i++)
    {
        for(int j = G; j >= obiecte[i].greutate; j--)
        {
            vec[j] = max((vec[j - obiecte[i].greutate] + obiecte[i].profit), vec[j]);
        }
    }
    int rezMax = 0;
    for(int i = 1; i <= G; i++)
        if(rezMax < vec[i])
            rezMax = vec[i];
    fout << rezMax;
    return 0;
}