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 Go (1.6) (judge verdict: Accepted)

package main

import (
  "fmt"
)

func stringIndex(ss []string, s string) int {
  i := -1
  for j := 0; j < len(ss); j++ {
    if ss[j] == s {
      i = j 
      break
    }
  }
  return i
}

func main() {
  w := []string{
    "Sunny",
    "Cloudy",
    "Rainy",
  }
  var s string
  fmt.Scan(&s)
  fmt.Println(w[(stringIndex(w, s)+1)%3])
}