#include <iostream>
#include <fstream>
using namespace std;

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

#define cin fin
#define cout fout

int n,gmax,g,p;
int profit[10001];

int main()
{
    cin>>n>>gmax;
    for(int i=1; i<=n; i++)
    {
        cin>>g>>p;
        for(int j=gmax-g; j>=0; j--)
        {
            int prof=profit[j]+p;
            if(prof>profit[j+g])
                profit[j+g]=prof;
        }
    }
    cout<<profit[gmax];

    return 0;
}