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)

import scala.annotation.tailrec

object Main {
  def main(args: Array[String]): Unit = {
    val sc = new java.util.Scanner(System.in)

    try {
      @tailrec
      def sub(n: Int, count: Int): Unit = {
        if (n == 0) {

        } else {
          println(s"Case ${count}: ${n}")
          sub(sc.nextInt, count + 1)
        }
      }
      sub(sc.nextInt, 1)
    } catch {
      case e: NoSuchElementException =>
        println("error: stdin is not found. Please take numbers.")
    }
  }
}