They have this you see, because of the anaesthesia, the side effect of the drugs to make them sleep. So we try to encourage them to ambulate, ambulate or we call it walking around. But again, we need to hold them either they are walking with walking aids as I told in the first question or we need to hold them, be beside them. And, you know, make them walk because we want to encourage smooth blood circulation, especially towards the in and out. The bllod circulation surrounding the wound area. That is most important. And some, you know, for walking for me - walking is one of the good thing that as exercise. Number two that some doctors, they will encourage us to for the elderly to buy the we call it, incentive spirometer. It's a - it's a. There's a 3 balls there. Then it's a some tools, you see. So, usually the elderly need to like suck them in. When they suck, the ball will go up. Then, there's a reading for it so maybe for today how many, you know, how many the ball can come up. So then from there, actually the. This incentive spirometer is to expand their lungs and loosen up the secretion because during the - any major operation, they are under general anaesthesia. So, that time their lungs are not functioning. The machine will take over. So there will be a lot of accumulation of secretion. So if we don't take out the secretion, it will become pneumonia. So, become pneumonia means infection of the lungs. Okay besides walking beside wearing compression stockings, besides elevate their legs, beside do the incentive spirometer. We can, I mean, encourage them to do coughing exercise because already do, once before after the spirometer, they do the exercise. Then after that, the ball will come out, so maybe we can do 10 times in every two hours. Then after that they will feel want to cough. The secretion, very big secretion will come up. So, ask them to cough up. But again, for example, if the wound is at the - our abdomine site or on the chest for example so it will be very painful to cough out. So, take a small pillow - a square pillow. Then, hold it on the chest or wherever the area of the wound. And then, and then cough.