#include <iostream>
using namespace std;
int N,a,b;
int main()
{
cin>>N;
for(int x=0; x<N; x++)
{
cin>>a>>b;
while(a!=b)
{
if(a>b) a/=2;
else if(a<b) b/=2;
}
cout<<a<<"0\n";
}
}