#include <stdio.h>
#include <algorithm>

#define MAXN 5010
#define MAXG 10010

int N, G, Pmax;
int W[MAXN], P[MAXN];
int D[2][MAXG];

int main(){
    freopen("energii.in", "r", stdin);
    freopen("energii.out", "w", stdout);

    scanf("%d%d", &N, &G);
    for(int i = 1; i <= N; ++i)
        scanf("%d%d", &W[i], &P[i]);

    int l=0;
    for(int i = 1; i <= N; ++i, l = 1 - l)
        for(int cw = G; cw <= 10001; ++cw){
            D[1-l][cw] = D[l][cw];

            if(W[i] <= cw)
                D[1-l][cw] = std::max(D[1-l][cw], D[l][cw - W[i]] + P[i]);
        }

    Pmax = D[l][G];

    printf("%d", Pmax);
    return 0;
}