#include <bits/stdc++.h>

using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");

struct obiect {
    int w, p;
} o[5005];

int n, g, dp[10010], Max = 0;

int main()
{
    in >> n >> g;
    for (int i = 1; i <= n; i++) {
        in >> o[i].w >> o[i].p;
    }

    for (int i = 1; i <= n; i++) {
        for (int j = g ; j >= o[i].w; j--){
            dp[j] = max(dp[j], dp[j - o[i].w] + o[i].p);
            Max = max(Max, dp[j]);
            }
    }
    out << Max;
    return 0;
}