22 4

#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("BAC.txt");
int a,b,n;
int h(int n) {
    int p=1;
    while(p<n){
     p*=2;
    }
    if(p==n) return 1;
    else return 0;
}

int main() {
  fin>>n;
  for (int i=1; i<=n; i++) {
    fin>>a>>b;
    for(int i=b;i>=a;i--){
        if(h(i)){
            cout<<i<<" ";
            break;
        }
        if(i==a && !h(i)) cout<<0<<" ";
    }
  }
}