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 Rust (judge verdict: Accepted)

use std::io;

fn get_line() -> String {
  let mut line = String::new();
  io::stdin()
    .read_line(&mut line)
    .ok();
  line
}

fn line_to_vec_i32(line: &str) -> Vec<i32> {
  line
    .trim()
    .split_whitespace()
    .map(|s| { s.parse::<i32>().unwrap_or(0) })
    .collect()
}

fn main() {
  let mut idx = 1;
  loop {
    let line = get_line();
    let v = line_to_vec_i32(&line);
    if v[0] == 0 {
      break;
    }
    else {
      println!("Case {}: {}", idx, v[0]);
      idx += 1;
    }
  }
}