#include <stdio.h>
#include <cmath>

int M[5000][10000], N, G, W[10000], P[10000];

void creare_matrice(int i, int cw){
	M[i][cw] = M[i - 1][cw];

	if(cw >= W[i])
		M[i][cw] = fmax(M[i - 1][cw], M[i - 1][cw - W[i]] + P[i]);
}

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", &W[i], &P[i]);


	for(int i = 1; i <= N; i++){
		for(int cw = 1; cw <= G; cw++){
			creare_matrice(i, cw);
		}
	}

	printf("%d", M[N][G]);

	return 0;	
}