#include<fstream.h>
ifstream f("bac.txt");
int a,b,n;
int p2(int n)
{ int p=1;
  while (p<=n) p=p*2;
  return p/2;
}

void main()
{  f>>n;
  for(int i=1;i<=n;i++)
    {  f>>a>>b;
       if(p2(b)>=a) cout<<p2(b)<<" ";
       else cout<<0;
    }
}