#include <fstream>

using namespace std;

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

int N,G,v[10001],w[10001],m[10001][10001];

int main()
{
    in>>N>>G;
    for(int i=1;i<=N;i++)
    {
        in>>w[i]>>v[i];
    }

    for(int i=1;i<=N;i++)
    {
        for(int j=0;j<=G;j++)
        {

            if(w[i]<=j)
            {
                m[i][j]=max(m[i-1][j], m[i-1][j-w[i]]+v[i]);
            }
            else
            {
                m[i][j]=m[i-1][j];
            }
        }
    }

    out<<m[N][G];
    return 0;
}