#include <fstream>

using namespace std;

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

struct cow
{
    int w, p;
};

int dp[5005][10005];
int n, g;
cow v[5005];

int main()
{
    cin>>n>>g;
    for(int i=1; i<=n; i++)
    {
        cin>>v[i].w>>v[i].p;
    }
    for(int j=1; j<=g; j++)
    {
        for(int i=1; i<=n; i++)
        {
            dp[i][j]=dp[i-1][j];
            if(j>=v[i].w)
            {
                dp[i][j]=max(dp[i][j], dp[i-1][j-v[i].w]+v[i].p);
            }
        }
    }
    cout<<dp[n][g];


    return 0;
}