class program {

void regresa(){
    turnleft();
    turnleft();
    while(frontIsClear)
        move();
    turnleft();
    turnleft();
}

program() {
    while(notFacingEast)
        turnleft();
    if(frontIsClear){
        move();
        if(frontIsClear){
            move();
            putbeeper();
        }
    }
    while(frontIsClear){
        iterate(2){
            if(frontIsClear){
                move();
            }
        }
        if(frontIsClear){
            move();
            putbeeper();
        }
    }
    regresa();
    iterate(3){
        if(frontIsClear){
            move();
        }
    }
    if(frontIsClear){
        move();
        putbeeper();
    }
    while(frontIsClear){
        iterate(4){
            if(frontIsClear){
                move();
            }
        }
        if(frontIsClear){
            move();
            putbeeper();
        }
    }
    regresa();
    turnoff();
}

}