#include <bits/stdc++.h>

using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");
int n, g, w[5005], p[5005], d[10005], ans;

int main() {
    in>>n>>g;
    for (int i = 1; i <= n; i++)
        in>>w[i]>>p[i];
    
    for (int i = 1; i <= n; i++)
        for(int j = g; j >= 0; j--) {
            if (j - w[i] >= 0) d[j] = max(d[j], d[j - w[i]] + p[i]);
            ans = max(ans, d[j]);
        }
    
    out<<ans<<'\n';
}