//rucsac
#include <bits/stdc++.h>
using namespace std;
const int nmax = 5005, gmax = 10005;

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

int N, G, dp[gmax];
typedef struct poza{
    int cost, prof;
}student;

student v[nmax];

int main(){
    
    fin>>N>>G;
    
    for(int i=1;i<=N;i++){
        fin>>v[i].cost>>v[i].prof;
    }
    
    for(int j=1;j<=N;j++){
        for(int i=G;i>=1;i--){
            if(i - v[j].cost >= 0){
                dp[i] = max(dp[i] , dp[i - v[j].cost] + v[j].prof);
            }
        }
    }
    
    fout<<dp[G];
    

    
}