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;
use std::cmp::Ordering;
use std::str::FromStr;

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

fn get_vector() -> Vec<i32> {
    let line = get_line();
    let vec : Vec<i32> = line.split_whitespace().map(|x| i32::from_str(x).unwrap()).collect();
    return vec;
}

fn main() {
    let mut i = 1;
    loop {
        let mut x = String::new();
        io::stdin().read_line(&mut x).unwrap();
        let x: i32 = x.trim().parse().unwrap();
        if x == 0 {
            break;
        }
        println!("Case {}: {}", i, x);
        i += 1;
    }
}