#include <iostream>
#include <fstream>

using namespace std;

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

const int maxS = 10005;
int n, g, dp[maxS], ans;

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