output_description: For each dataset, print x in the following format:
  
      
      
      Case i: x
      
  
  where i is the case number which starts with 1. Put a single space between
  "Case" and i. Also, put a single space between ':' and x.
input_description: The input consists of multiple datasets. Each dataset consists of an integer x
  in a line.
  
  The input ends with an integer 0. You program should not process (print) for
  this terminal symbol.
attempt: set = list(map(int, input().split()))
  index = 0
  next = set[index]
  while next:
      print("Case " + str(index) + ": " + str(set[index]))
      index += 1
      next = set[index]
  
problem_description: Print Test Cases
  
  In the online judge system, a judge file may include multiple datasets to
  check whether the submitted program outputs a correct answer for each test
  case. This task is to practice solving a problem with multiple datasets.
  
  Write a program which reads an integer x and print it as is. Note that
  multiple datasets are given for this problem.
samples: [{"input": "5\n    11\n    7\n    8\n    19\n    0", "output": "Case 1: 3\n    Case 2: 5\n    Case 3: 11\n    Case 4: 7\n    Case 5: 8\n    Case 6: 19"}]