#include<iostream>
#include<memory.h>
using namespace std;
int dp[10010];
int max(int a,int b)
{
	return a>b?a:b;
}
int main()
{
	int n,v,vi[10100],wi[10100],i,j;
	while(cin>>n>>v)
	{
		memset(vi,0,sizeof(vi));
		memset(wi,0,sizeof(wi));
		for(i=0;i<n;i++)
			cin>>wi[i];
		for(i=0;i<n;i++)
			cin>>vi[i];
		memset(dp,0,sizeof(dp));
        for(i=0;i<n;i++)
			for(j=vi[i];j<=v;j++)
				dp[j]=max(dp[j],dp[j-vi[i]]+wi[i]);
			cout<<dp[v]<<endl;
	}
	return 0;
}