#include <fstream>
using namespace std;

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

const int N=5005, G=10005;
int n, g, w[N], v[N], dp[N][G];

int main()
{
    fin>>n>>g;
    for(int i=1;i<=n;++i)
        fin>>w[i]>>v[i];

    for(int i=1;i<=n;++i)
        for(int j=0;j<=g;++j)
        {
            if(w[i]>j)dp[i][j]=dp[i-1][j];
            else dp[i][j]=max(dp[i-1][j], dp[i-1][j-w[i]]+v[i]);
        }
    fout<<dp[n][g];

    return 0;
}