There are many food shortages in Venezuela. Many Venezuelans cannot buy basic goods. This problem is made worse because people buy too much of something when they see it in the stores. It's a kind of panic buying. President Nicolas Maduro has started a new system to stop people buying too much. Shoppers must soon start scanning their fingerprints when they buy food at grocery stores and supermarkets. This is to make sure that more people can buy an equal share of food and groceries. Mr Maduro has not said when the new system will start, but people close to him say it could be January. It is also unclear how much food people can buy and what happens if they buy too much.