What is the method to prevent Excel from prioritizing cells starting with "MARxxxx" in alphabetical order?

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To prevent Excel from prioritizing cells starting with "MARxxxx" in alphabetical order, you can use a custom sorting method. Here's how to do it:

1. Select the range of cells that you want to sort.
2. Click on the "Data" tab in the Ribbon.
3. Click on the "Sort" button.
4. In the "Sort" dialog box, make sure that the "Sort by" field is set to the column you want to sort by.
5. In the "Order" field, choose "Custom List".
6. Click on the "Custom List" button.
7. In the "Custom Lists" dialog box, click on "NEW LIST".
8. Type "MARxxxx" (without quotes) in the "List entries" field and click "Add".
9. Click "OK" to close all dialog boxes.
10. Click "OK" in the "Sort" dialog box to apply the custom sorting method.

This will sort the cells in the normal alphabetical order, except that all cells starting with "MARxxxx" will be grouped together at the top of the list.