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 Scala (judge verdict: Accepted)

object Main extends App {
  var i = 0
  val sb = StringBuilder.newBuilder
  for(x <- io.Source.stdin.getLines() if x != "0") {
    i += 1
    sb.append("Case ").append(i).append(": ")
      .append(x).append('\n')
    // sb.append(s"Case $i : $x\n")
    // sb.append("Case " + i + ": " + x + "\n")
  }
  print(sb)
}