#include <iostream>
using namespace std;
int main()
{
int n,v[10001],a,b,t = 0;
cin >> n;
for (int i = 0;i < n;++i)
{
cin >> a >> b;
if ( a > b )
{
a ^= b;
b ^= a;
a ^= b;
}
int P = 1, maxim = 0;
while (P <= b)
{
if (P >= a)
maxim = P;
P *= 2;
}
v[++t] = maxim;
}
for (int i = 1;i <= t;++i)
cout << v[i] << endl;
return 0;
}