#include <bits/stdc++.h>

using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int v[10005];
int main()
{
    int n, g, sol = 0;
    fin >> n >> g;
    vector <int> w(n+1);
    vector <int> p(n+1);
    for(int i = 1; i <= n; i++)
        fin >> w[i] >> p[i];
    for(int i = 1; i <= n; i++)
    {
        for(int j = g-w[i]; j>=0; j--)
        {
            if(v[j+w[i]] < v[j] + p[i])
            {
                v[j+w[i]] = v[j] + p[i];
                if(v[j+w[i]] > sol)
                    sol = v[j+w[i]];
            }
        }
    }
    fout << sol;
    return 0;
}