#include <iostream>
#include <string>
#include <cstring>
using namespace std;
const int INF = 1000*1000*1000;


int main()

{
    int l,r; cin >> l >> r;
    int k2 = 2;
    int k3 = 3;

    int ans_rk2_ = r/k2;
    int ans_rk3_ = r/k3;

    int ans_lk2_ = (l-1)/k2;
    int ans_lk3_ = (l-1)/k3;

    int result_k2_ = ans_rk2_ - ans_lk2_ ;
    int result_k3_ = ans_rk3_ - ans_lk3_ ;

    if(result_k2_ > result_k3_ )
    {
        cout << 2;
    }
    else
    {
        cout << 3;
    }

}