Write an Apex method that takes an integer n as input and returns a list of strings. The list should contain the numbers from 1 to n as strings, with the following exceptions:
- For multiples of three, use "Fizz" instead of the number.
- For multiples of five, use "Buzz" instead of the number.
- For numbers which are multiples of both three and five, use "FizzBuzz".
Examples:
Input: 15
Output: ['1', '2', 'Fizz', '4', 'Buzz', 'Fizz', '7', '8', 'Fizz', 'Buzz', '11', 'Fizz', '13', '14', 'FizzBuzz']
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