#include <bits/stdc++.h>
#define MMAX 10005
using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");

int dp[MMAX], G[MMAX], p[MMAX], s, n, g;
///p-valoare G-greutate
int main()
{
    in>>n>>g;
    for(int i=0; i<n; i++)
    {
        in>>G[i]>>p[i];
    }
    for(int i=0; i<n; i++)
    {
        for(int j=g-G[i]; j>=0; j--)
        {
            if(dp[j+G[i]]< dp[j]+p[i])
            {

                dp[j+G[i]]=dp[j]+p[i];
                if(dp[j+G[i]]>s)
                {
                    s=dp[j+G[i]];
                }
            }
        }
    }

    out<<s;

}