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)

fn main() {
    let mut v: Vec<String> = Vec::new();
    loop {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).ok();
        let va = s.trim();
        if va == "0" {break;}
        v.push(va.to_string());
    }
    for (i, w) in v.iter().enumerate() {
        if w == "0" { break;}
        println!("Case {}: {}", i + 1, w);
    }

}