#include <iostream>
#include <cstdio>
using namespace std;

int G,n;
int d[5001][10001];

struct obiect{
int p,w;
}obj[5001];

int main()
{
    freopen("rucsac.in","r",stdin);
    freopen("rucsac.out","w",stdout);
    scanf("%d%d",&n,&G);
    for(int i=1;i<=n;i++)
        scanf("%d%d",&obj[i].w,&obj[i].p);

    for(int i=1;i<=n;i++)
    {
        for(int g=0;g<=G;g++)
        {
            if(obj[i].w<=g)
            {
                d[i][g]=max(obj[i].p+d[i-1][g-obj[i].w],d[i-1][g]);
            }
            else
            {
                d[i][g]=d[i-1][g];
            }
        }
    }
    printf("%d\n",d[n][G]);
    return 0;
}