#include<stdio.h>
//#include<bits/stdc++.h>
#include<string.h>
#include<iostream>
#include<math.h>
#include<sstream>
#include<set>
#include<queue>
#include<map>
#include<vector>
#include<algorithm>
#include<limits.h>
#define inf 0x3fffffff
#define INF 0x3f3f3f3f
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define LL long long
#define ULL unsigned long long
using namespace std;
LL x,y,z,a,b;
long long gcd(long long a,long long b)
{
    return b?gcd(b,a%b):a;
}
long long lcm(long long n, long long m)
{
    long long p = gcd(n, m);
    return (n/p*m);
}
LL SUM(LL x)
{
    LL sum=0;
    sum+=(b/x)-(a-1)/x;
    return sum;
}
int main ()
{

    while(cin>>x>>y>>z>>a>>b)
    {
        LL sum_1=0,sum_2=0,sum_3=0;
        LL sum_4=0;
        LL sum_5=0;
        sum_1+=SUM(x);
        sum_2+=SUM(y);
        sum_3+=SUM(z);
       // cout<<lcm(x,y)<<endl;
        sum_4+=SUM(lcm(x,y))+SUM(lcm(x,z))+SUM(lcm(y,z));
        sum_5+=SUM(lcm(lcm(x,y),lcm(y,z)));
        cout<<sum_1+sum_2+sum_3-sum_4+sum_5<<endl;

    }
    return 0;
}