/*
ID: Sho10
LANG: C++
TASK:
*/
#include <bits/stdc++.h> //JuniorMonster a.k.a Sho10
#define ll long long int
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define sz size
#define f first
#define s second
#define pb push_back
#define er erase
#define in insert
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000000007
#define PI 3.14159265359
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,g,dp[100005];
pair<ll,ll>a[5005];
int32_t main(){
CODE_START;
ifstream cin("rucsac.in");
ofstream cout("rucsac.out");
cin>>n>>g;
for(ll i=0;i<n;i++)
{
    cin>>a[i].f>>a[i].s;
}
for(ll i=0;i<n;i++)
{
    for(ll j=g;j>=0;j--)
    if(j-a[i].f==0){
        dp[j]=max(dp[j],dp[j-a[i].f]+a[i].s);
    }else if(j-a[i].f>0){
         dp[j]=max(dp[j],dp[j-a[i].f]+a[i].s);
    }
}
ll ans=0;
for(ll i=0;i<=g;i++)
    ans=max(ans,dp[i]);
cout<<ans<<endl;
}