#include <iostream>
#include <fstream>
#define NMAX 10005
using namespace std;

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

int n, g, w[NMAX], p[NMAX], s[NMAX][NMAX];

void citire()
{
    fin>>n>>g;
    for(int i=1; i<=n; ++i)
    {
        fin>>w[i]>>p[i];
    }
}
void matrice()
{
    for(int i=1; i<=n; ++i)
        for(int j=w[i]; j<=g; ++j)
        {
            s[i][j]=max(s[i-1][j], s[i-1][j-w[i]]+p[i]);
        }
}
int main()
{
    citire();
    matrice();
    fout<<s[n][g];
    return 0;
}