Problem:
Score: 100 points

Problem Statement

The weather in Takahashi's town changes day by day, in the following cycle: Sunny, Cloudy, Rainy, Sunny, Cloudy, Rainy, ...

Given is a string S representing the weather in the town today. Predict the weather tomorrow.

Constraints

S is Sunny, Cloudy, or Rainy.

Input

Input is given from Standard Input in the following format:

S

Output

Print a string representing the expected weather tomorrow, in the same format in which input is given.

Sample Input 1

Sunny

Sample Output 1

Cloudy

In Takahashi's town, a sunny day is followed by a cloudy day.

Sample Input 2

Rainy

Sample Output 2

Sunny

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io::Read;

fn main() {
    let mut buf = String::new();

    std::io::stdin().read_to_string(&mut buf).unwrap();

    let mut iter = buf.split_whitespace();
    let s: String = iter.next().unwrap().parse().unwrap();

    let ans = if s == "Sunny" {
        "Cloudy"
    } else if s == "Cloudy"{
        "Rainy"
    } else {
        "Sunny"
    };
    // let ans: String = match &s{
    //     "Sunny" => "Cloudy",
    //     "Cloudy" => "Rainy",
    //     "Rainy" => "Sunny",
    //     _ => "",
    // };

    println!("{}", ans);
}