output_description: If S starts with `YAKI`, print `Yes`; otherwise, print `No`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: print("Yes" if input()[:4] == "YAKI" else "NO")
  
problem_description: Statement
  
  Ringo is giving a present to Snuke.
  
  Ringo has found out that Snuke loves _yakiniku_ (a Japanese term meaning
  grilled meat. _yaki_ : grilled, _niku_ : meat). He supposes that Snuke likes
  grilled things starting with `YAKI` in Japanese, and does not like other
  things.
  
  You are given a string S representing the Japanese name of Ringo's present to
  Snuke. Determine whether S starts with `YAKI`.
samples: [{"input": "YAKINIKU", "output": "Yes\n    \n\n`YAKINIKU` starts with `YAKI`.\n\n* * *"}, {"input": "TAKOYAKI", "output": "No\n    \n\n`TAKOYAKI` (a Japanese snack. _tako_ : octopus) does not start with `YAKI`.\n\n* * *"}, {"input": "YAK", "output": "No"}]