output_description: If it is possible to change S into `AKIHABARA`, print `YES`; otherwise, print
  `NO`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: s = input()
  for i in range(len(s)):
    if s[i] == "K" ans i == 0:
      s = s[:i] + "A" + s[i:]
    elif s[i] == "H" and s[i+1] !=  "A":
      s = s[:i] + "A" + s[i:]
    elif s[i] == "B" and s[i+1] !=  "A":
      s = s[:i] + "A" + s[i:]
    elif s[i] == "R" and s[i+1] !=  "A":
      s = s[:i] + "A" + s[i:]
  
  if s == "AKIHABARA":
    print("YES")
  else:
    print("NO")
problem_description: Statement
  
  You are given a string S.
  
  Takahashi can insert the character `A` at any position in this string any
  number of times.
  
  Can he change S into `AKIHABARA`?
samples: [{"input": "KIHBR", "output": "YES\n    \n\nInsert one `A` at each of the four positions: the beginning, immediately after\n`H`, immediately after `B` and the end.\n\n* * *"}, {"input": "AKIBAHARA", "output": "NO\n    \n\nThe correct spell is `AKIHABARA`.\n\n* * *"}, {"input": "AAKIAHBAARA", "output": "NO"}]