#include<bits/stdc++.h>

using namespace std;

const int limit = 1e7+7;
vector<bool> prime(limit, true);

void sieve(){   // thuat toan sang` nguyen to.
    prime[0] = prime[1] = false;
    for(int i = 2; i < limit ; i++){
        if (prime[i] == false) break;
        for(int j = i*2 ; j < limit ; j += i){
            prime[j] = false;
        }
    }
}

int main(){

    sieve();

    int left , right;
    cin >> left >> right;
    // in ra cac so trong doan [left , right]
    for(int i = left ; i <= right ; i++){
        if (prime[i] == true) cout << i << " ";
    }

    return 0;
}