Untitled

#include <iostream>
#include <cmath>
using namespace std;
int main() {
    int a, b, flag;
    flag = 0;
    cin >> a >> b;
    for (int i = a; i < b + 1; i++){
        if (i == 2 || i == 3) cout << i << endl;
        else if (i != 1) {
            for (int j = 2; j < i; j++) {
                if (i % j == 0) {
                    flag = 1;
                    break;
                }
            }
            if (flag != 1) cout << i << endl;
            flag = 0;
        }
    }
}