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::*;
use std::str::*;
use std::collections::HashMap;

fn main() {
    let mut map = HashMap::new();
    map.insert("Sunny".to_string(), "Cloudy".to_string());
    map.insert("Cloudy".to_string(), "Rainy".to_string());
    map.insert("Rainy".to_string(), "Sunny".to_string());
    let key: String = read();
    println!("{}", map.get(&key).unwrap());
}

fn read<T: FromStr>() -> T {
    let mut line: String = String::new();
    stdin().read_line(&mut line).ok();
    line.trim().parse().ok().unwrap()
}