#include <bits/stdc++.h>

using namespace std;

int a,b;

bool kt(int n)
{
    bool ok = true;
    if (a!=1)
    {
        for (int i = 2;i<=sqrt(a);i++)
        {
            if (a % i == 0)
                {
                    ok = false;
                    break;
                };
        }
    } else ok = false;
    return ok;
}

void duyet()
{
    int x[b-a+1] = {0};
    for (int i = 0;i<=b-a;++i)
    {
        if (x[i] == 0 && kt(i+a) == 1)
        {
            x[i] = 1;
            if (i+a != 1)
            {
                int j = i*i;
                while (j <= b-a)
                {
                    j+=i;
                    x[j] = -1;
                }
            }
        }
    }
    for (int i = 0;i<=b-a;++i)
    {
        if (x[i] == 1)
        {
            cout << i+a << endl;
        }
    }
}

int main()
{
    cin >> a >> b;
    return 0;
}