#include <bits/stdc++.h>
using namespace std;
int n,g[10001],v[10001],r[10001][10001],Gmax;

void citire()
{
    cin>>n>>Gmax;
    for(int i=1;i<=n;i++)
       cin>>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]]);
    cout<<r[n][Gmax];
    return 0;
}