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: def examA():
      S = SI()
      ans = "No"
      if S[:4] == "YAKI":
          ans = "Yes"
      print(ans)
  
  
  import sys, copy, bisect, itertools, heapq, math
  from heapq import heappop, heappush, heapify
  from collections import Counter, defaultdict, deque
  
  
  def I():
      return int(sys.stdin.readline())
  
  
  def LI():
      return list(map(int, sys.stdin.readline().split()))
  
  
  def LSI():
      return list(map(str, sys.stdin.readline().split()))
  
  
  def LS():
      return sys.stdin.readline().split()
  
  
  def SI():
      return sys.stdin.readline().strip()
  
  
  mod = 10**9 + 7
  inf = float("inf")
  
  if __name__ == "__main__":
      examA()
  
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"}]