#include<bits/stdc++.h>
using namespace std;
#define INIT  ios_base :: sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define mp make_pair
#define pb push_back
#define ft first
#define sc second
#define ll long long
#define pii pair<int, int>
#define count_bits __builtin_popcount
#define int ll


ifstream fin("rucsac.in"); ofstream fout("rucsac.out");
#define cin fin
#define cout fout



int n, g, w[5001], c[5001];

int dp[10001];

int32_t main(){
INIT
cin>>n>>g;
for(int i=1; i<=n; i++){
    cin>>w[i]>>c[i];
}

int sum=0;
for(int i=1; i<=n; i++){
    for(int j=g; j>=0; j--){
        if( ((j+w[i])<=g) && ( (dp[j]>0) || (  j==0 )  ) ){
            dp[j+w[i] ]=max(dp[j+w[i] ], dp[j]+c[i]);
            sum=max( dp[j+w[i] ], sum );
        }
    }
}

cout<<sum;

return 0;
}