#include <fstream>
using namespace std;

ifstream fin("rucsac.in");
ofstream fout("rucsac.out");

int dp[10005];
int n, g;



int main() {
	fin >> n >> g;
	for (int i = 1; i <= n; i++) {
		int w, p;
		fin >> w >> p;
		for (int j = g; j >= w; j--) {
			int potential = p + dp[j - w];
			if (potential > dp[j])
				dp[j] = potential;
		}
	}

	fout << dp[g];
	return 0;
}