#include <bits/stdc++.h>
#include<vector>
using namespace std;
#define ll long long
int main() {
ll n;
ll a,b,c,d;
cin>>a>>b>>c>>d>>n;
ll count=0;
for(ll i=1;i<=n;i++)
{
if(i%a==0||i%b==0||i%c==0||i%d==0)
{
count++;
}
}
cout<<count;
return 0;
}
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