#include <fstream>
using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");
int n,g,w[10010],p[10010],ruc[10010],maxg;
bool v[10010];
int main()
{
    in>>n>>g;
    v[0]=1;
    for(int i=1;i<=n;++i)
        in>>w[i]>>p[i];
    for(int i=1;i<=n;++i)
    {
        for(int j=g-w[i];j>=0;--j)
        {
            if(v[j]==1)
            {
                v[j+w[i]]=1;
                if(ruc[j]+p[i]>ruc[j+w[i]])
                    ruc[j+w[i]]=ruc[j]+p[i];
            }
        }
    }
    for(int i=1;i<=g;++i)
        if(ruc[i]>maxg)
            maxg=ruc[i];
    out<<maxg;
    return 0;
}