Hi, I am working on Python. Could you make this code by following below instructions?

1)

def check(word):

""" return String based on parameter word, a String """

# you write code here

Constraints

• word contains between 1 and 50 characters, inclusive
• each character of word will be a lower-case letter 'a'-'z'

Examples

1. word = "pikapi"
   
   Returns: "YES"
   
       

   "pikapi" = "pi" + "ka" + "pi", so Pikachu can say it.

2. word = "pipikachu"
   
   Returns: "YES"
   
       

   This time we have "pipikachu" = "pi" + "pi" + "ka" + "chu", so Pikachu can say it as well.

3. word = "pikaqiu"
   
   Returns: "NO"
   
       

   Pikachu can't say "pikaqiu" since 'q' does not appear in "pi", "ka", or "chu".

4. word = "chupikachupipichu"
   Returns: "YES"
   
       

5. word = "duke"
   Returns: "NO"