BasicsExamShuffleBits

using System;


class ShuffleBits
{
    static void Main()
    {
        uint firstNumber = uint.Parse(Console.ReadLine());  // 123; // 321; // uint.Parse(Console.ReadLine());
        uint secondNumber = uint.Parse(Console.ReadLine()); // 321; // 123; // uint.Parse(Console.ReadLine());
        ulong result = 0;
        // Console.WriteLine(Convert.ToString(firstNumber, 2).PadLeft(32, '0'));
        // Console.WriteLine(Convert.ToString(secondNumber, 2).PadLeft(32, '0'));

        if (firstNumber >= secondNumber)
        {
            for (int i = 31; i >= 0; i--)
            {
                result = (result << 1) | ((firstNumber >> i) & 1);
                result = (result << 1) | ((secondNumber >> i) & 1);
            }
        }
        else
        {
            for (int i = 31; i >= 0; i -=2 )
            {
                // 1. solution
                result = (result << 2) | ((firstNumber >> i - 1) & 3);
                result = (result << 2) | ((secondNumber >> i - 1) & 3);

                // 2. solution. this also works
                //result = (result << 1) | ((firstNumber >> i) & 1);
                //result = (result << 1) | ((firstNumber >> i - 1) & 1);
                //result = (result << 1) | ((secondNumber >> i) & 1);
                //result = (result << 1) | ((secondNumber >> i - 1) & 1);
            }
        }

        Console.WriteLine(result);
    }
}