#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>

using namespace std;

const int MAXN=16;

int a[MAXN],i,j,k,ans,l,r,n;

int main()
{
	freopen("eight.in","r",stdin);
	freopen("eight.out","w",stdout);
	scanf("%d",&n);
	for (i=1;i<=n;i++)
		scanf("%d",&a[i]);
	ans=0;
	scanf("%d%d",&l,&r);
	while (l%8!=0) l++;
	for (i=l;i<=r;i+=8)
	{
		for (j=1;j<=n;j++)
			if (i%a[j]==0) break;
		if (j==n+1) ans++;
	}
	printf("%d\n",ans);
	return 0;
}