output_description: Print a string representing the expected weather tomorrow, in the same format
  in which input is given.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: S = input()
  
  odd = list(S[::2])
  even = list(S[1::2])
  xx = "No"
  
  for i in range(len(odd)):
      check = 0
      if odd[i] == "L" or "U" or "D":
          check += 1
  
  if check == len(odd):
      x = "Y"
  
  for i in range(len(even)):
      check2 = 0
      if even[i] == "R" or "U" or "D":
          check2 += 1
  
  if check2 == len(even):
      x2 = "Y"
  
  
  if x and x2 == "Y":
      xx = "Yes"
  
  
  print(xx)
  
problem_description: 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.
samples: [{"input": "Sunny", "output": "Cloudy\n    \n\nIn Takahashi's town, a sunny day is followed by a cloudy day.\n\n* * *"}, {"input": "Rainy", "output": "Sunny"}]