#include <cstdio>

#define NMAX 5005
#define GMAX 10005

int n,g;
int w[NMAX],p[NMAX];
int dp[GMAX];


inline int max(const int a,const int b)
{
    return (a>b?a:b);
}

void read()
{
    scanf("%d%d",&n,&g);
    for(int i=1;i<=n;++i)
        scanf("%d%d",&w[i],&p[i]);
}

void solve()
{
    for(int i=1;i<=n;++i)
        for(int j=g;j>=w[i];--j)
            dp[j]=max(dp[j],dp[j-w[i]]+p[i]);
    printf("%d\n",dp[g]);
}

int main()
{
    freopen("rucsac.in","r",stdin);
    freopen("rucsac.out","w",stdout);
    read();
    solve();
    return 0;
}