#include <iostream>
#include <iomanip>
#include <fstream>
#include <algorithm>

using namespace std;

ifstream f("rucsac.in");
ofstream g("rucsac.out");

int n, G, raspuns=0;
int w[10000], p[10000];
int x[10000];

int main()
{
    int i, j;
    f>>n>>G;
    for(i=1; i<=n; ++i)
        f>>w[i]>>p[i];
    x[0]=0;
    for(i=1; i<=n; ++i)
    {
        for(j=G-w[i]; j>=0; --j)
        {
            if(x[j+w[i]] < x[j]+p[i])
            {
                x[j+w[i]] = x[j]+p[i];
                if(x[j+w[i]] > raspuns)
                    raspuns = x[j+w[i]];
            }
        }
    }
    g<<raspuns;

    return 0;
}