#include <fstream>
#include <algorithm>
#define nmax 5002
#define gmax 10001
using namespace std;


ifstream f("rucsac.in");
ofstream g("rucsac.out");
int dp[gmax + 1] , weight[nmax + 1] , profit[nmax + 1];

int main(){
	int N, G;
	f >> N >> G;

	for(int i = 0; i < N; i++){
		f >> weight[i] >> profit[i];
	}
	for( int i = 0; i < N; i++){
		for( int j = G; j >= 0; j--)
			if( j >= weight[i]){
				dp[j] = max(dp[j], dp[j - weight[i]] + profit[i]);
			}
	}
	g << dp[G] <<"\n";
}