input: Write a function that eliminates duplicate tuple elements and substitutes the repeats with a specified value.
  assert process_tuple((1, 1, 4, 4, 4, 5, 5, 6, 7, 7)) == (1, 'MSP', 4, 'MSP', 'MSP', 5, 'MSP', 6, 7, 'MSP')
  assert process_tuple((2, 3, 4, 4, 5, 6, 6, 7, 8, 9, 9)) == (2, 3, 4, 'MSP', 5, 6, 'MSP', 7, 8, 9, 'MSP')
  assert process_tuple((2, 2, 5, 4, 5, 7, 5, 6, 7, 7)) == (2, 'MSP', 5, 4, 'MSP', 7, 'MSP', 6, 'MSP', 'MSP')
output: def process_tuple(input_tuple):
      seen = set()
      output = []
      for item in input_tuple:
          if item in seen:
              output.append('MSP')
          else:
              seen.add(item)
              output.append(item)
      return tuple(output)