class program
    {
    define halfturn()
        {
        turnleft();
        turnleft();
        }
    define backmove()
        {
        halfturn();
        move();
        }
    define leftmove()
        {
        turnleft();
        move();
        }
    define miraSur()
        {
        while( notFacingSouth )
            turnleft();
        }
    define camina()
        {
        leftmove();
        if( nextToABeeper )
            {
            backmove();
            leftmove();
            if( nextToABeeper )
                {
                backmove();
                leftmove();
                }
            }
        putbeeper();
        putbeeper();
        }

    program()
        {
        miraSur();
        move();
        turnleft();
        while( anyBeepersInBeeperBag )
            camina();
        turnoff();
        }
    }