#include <bits/stdc++.h>
using namespace std;
ifstream ci("rucsac.in");
ofstream cou("rucsac.out");

int n,G,v[6000],g[6000];
int dp[6000][10005];

void citire()
{
    ci>>n>>G;
    int i;

    for(i=1; i<=n; i++)
    {
        ci>>g[i]>>v[i];
    }


}

void rez(){
    int i,j;
    int s=0;
    for(i=1;i<=n;i++){
        for(j=0;j<=G;j++){

            dp[i][j]=dp[i-1][j];
            if(j>=g[i]){
                dp[i][j]=max(dp[i-1][j],dp[i-1][j-g[i]]+v[i] );
            }



        }
    }
    for(i=n,j=0;j<=G;j++){
        s=max(s,dp[i][j]);
    }
    cou<<s;

}

int main()
{
    citire();
    rez();
    return 0;
}