#include<bits/stdc++.h>
using namespace std;

int main()
{
    int x,y;
    while(cin>>x>>y)
    {
        while(x != y)
        {
            if(x>y)
            {
                x /= 2;
            }
            else {
            {
                y /= 2;
            }
            }
        }
        cout<<x<<endl;

    }

    return 0;
}