Problem:
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.

Input

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.

Output

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.

Constraints

1 ≤ x ≤ 10000

The number of datasets ≤ 10000

Sample Input

3
5
11
7
8
19
0

Sample Output

Case 1: 3
Case 2: 5
Case 3: 11
Case 4: 7
Case 5: 8
Case 6: 19

Solution in Haskell (judge verdict: Accepted)

import Control.Applicative
    
solve :: Int -> Int

solve
    = id

output :: Int -> Int -> String

output i x
    = "Case " ++ show i ++ ": " ++ show x

loop :: Int -> IO ()
    
loop i
    = do
        input <- read <$> getLine
        case solve input of
            0
                -> return ()
                
            x
                -> do
                    putStrLn $ output i x
                    loop $ i + 1
                    
main :: IO ()
    
main
    = loop 1