input: Write a python function to determine the origin of numbers in a given range by checking multiples of 3 and 5 and returning "Fizz", "Buzz", or "FizzBuzz". Use the given assertions as tests.
  assert find_origin(1, 15) == [1, 2, 'Fizz', 4, 'Buzz', 'Fizz', 7, 8, 'Fizz', 'Buzz', 11, 'Fizz', 13, 14, 'FizzBuzz']
  assert find_origin(10, 20) == ['Buzz', 11, 'Fizz', 13, 14, 'FizzBuzz', 16, 17, 'Fizz', 19, 'Buzz']
  assert find_origin(21, 30) == ['Fizz', 22, 23, 'Fizz', 'Buzz', 26, 'Fizz', 28, 29, 'FizzBuzz']
output: def find_origin(start, end):
      result = []
      for i in range(start, end + 1):
          if i % 3 == 0 and i % 5 == 0:
              result.append('FizzBuzz')
          elif i % 3 == 0:
              result.append('Fizz')
          elif i % 5 == 0:
              result.append('Buzz')
          else:
              result.append(i)
      return result