#include <iostream>
#include <fstream>

using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");
long long int p[10001];
int main()
{
    long long int n, g;
    in >> n >> g;
    for(int i = 1; i <= n; i++)
    {
        int pr, w;
        in >> w >> pr;
        for(int j = g; j >= w; j--)
        {
            p[j] = max(p[j], pr+p[j-w]);
        }
    }
    long long int maxim = 0;
    for(int i = 1; i <= g; i++) maxim = max(maxim, p[i]);
    out << maxim;
    return 0;
}