#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[5005][10005];

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