#include <bits/stdc++.h>
using namespace std;
ifstream f("rucsac.in");
ofstream gout("rucsac.out");
int n,g[10001],v[10001],r[10001][10001],Gmax;

void citire()
{
    f>>n>>Gmax;
    for(int i=1;i<=n;i++)
       f>>g[i]>>v[i];
}

int main()
{
    citire();
    ///r[i][j]=valoarea maxima obtinuta din obiectele 1..i
    ///intr-un rucsac cu capacitatea maxima j
    for(int i=1;i<=n;i++)
        for(int j=0;j<=Gmax;j++)
            if(g[i]>j)r[i][j]=r[i-1][j];
            else r[i][j]=max(r[i-1][j],v[i]+r[i-1][j-g[i]]);
    gout<<r[n][Gmax];
    return 0;
}