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 read_line() -> String {
    let mut return_ = format!("");
    std::io::stdin().read_line(&mut return_).ok();
    return_.pop();
    return_
}

fn main() {
    let mut n: i32;
    let mut i = 1;
    loop {
        n = read_line().parse().unwrap();
        if n == 0 {
            break;
        }
        println!("Case {}: {}", i, n);
        i = i + 1;
    }
}