Data matching and validation

I have data in two different columns in sheet 1. The data should contain the same number strings as each other. I have been unsuccessful creating a code that could verify that the numbers in each column are the same. The order by rows is not important, only that one column doesn't have extra or less rows of these number strings as the other. I have attached a workbook that will further explain this. Help would be greatly appreciated. Thank you.
Data validation question.xlsx