Consider the following paragraph:

If you notice any issues with the door's operation, such as unusual noises or difficulty in sliding the panel, it's best to contact a qualified service technician to inspect and repair the door. These are shifting glass panels which are a type of sliding door that uses multiple glass panels that move horizontally along a track. To deploy the shifting glass panels, you'll first need to unlock them from their closed position. Once the panels are unlocked, you can slide them along the track to open up the desired opening. If the shifting glass panels have a stacking configuration, where the panels stack on one side of the opening when opened, it's important to ensure that there is enough space for the panels to stack without obstruction. In terms of maintenance, it's important to keep the track clean and free of debris to ensure smooth operation of the panels. If you notice any issues with the panels' operation, contact us and we will inspect and repair the panels.

Can you find the point from where the author starts talking about a new topic? In your entire response, the letter y should appear less than 49.
user