#include <iostream>
#include <fstream>

using namespace std;

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

int n, g, Pmax;
int w[5010], p[5010];
int dp[10001][10001];

int main()
{
    fin>>n>>g;
    for(int i=1; i<=n; i++)
        fin>>w[i]>>p[i];
    for(int i=1; i<=n; i++)
        for(int k=0; k<=g; k++)
        {
            dp[i][k] = dp[i-1][k];
            if(w[i]<=k)
                dp[i][k] = max(dp[i][k], dp[i - 1][k - w[i]] + p[i]);
        }
    Pmax = dp[n][g];
    fout<<Pmax;
    return 0;
}