#include <bits/stdc++.h>
#define MAXN 5005
#define MAXG 10005

using namespace std;

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

int n, g, dp[MAXG];
struct Obiect {
    int w, p;
} obiecte[MAXN];

void citire() {
    fin >> n >> g;
    for (int i = 1; i <= n; i++)
        fin >> obiecte[i].w >> obiecte[i].p;
}

void rezolvare() {
    for (int i = 1; i <= n; i++)
        for (int j = g; j >= obiecte[i].w; j--)
            if (dp[j - obiecte[i].w] + obiecte[i].p > dp[j])
                dp[j] = dp[j - obiecte[i].w] + obiecte[i].p;
    fout << dp[g];
}

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