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)

#![allow(dead_code)]
use std::io;

fn main() {
    solve_b();
}

fn solve_d() {
    let mut x = String::new();

    io::stdin().read_line(&mut x).unwrap();

    let v: Vec<i32> = x.trim()
        .split(' ')
        .map(|s| s.parse::<i32>().unwrap())
        .collect();

    let w = v[0];
    let h = v[1];
    let x = v[2];
    let y = v[3];
    let r = v[4];
    if x + r <= w && 0 <= x - r && 0 <= y - r && y + r <= h {
        println!("Yes");
    } else {
        println!("No");
    }
}

fn solve_c() {
    let mut x = String::new();

    io::stdin().read_line(&mut x).unwrap();

    let mut v: Vec<u32> = x.trim()
        .split(' ')
        .map(|s| s.parse::<u32>().unwrap())
        .collect();

    v.sort();
    println!("{} {} {}", v[0], v[1], v[2]);
}

fn solve_b() {
    let mut i = 1;
    loop {
        let mut x = String::new();
        io::stdin().read_line(&mut x).unwrap();
        let n = x.trim().parse::<u64>().unwrap();

        if n == 0 {
            break;
        } else {
            println!("Case {}: {}", i, n);
            i += 1;
        }
    }
}

fn solve_a() {
    for _i in 0..1000 {
        println!("Hello World");
    }
}