input: def removeDuplicates(arr):
      result = [] 
  
      # traverse for all elements 
      for i in arr: 
  
          # check if exists in result 
          if i not in result: 
              result.append(i) 
  
      # return result 
      return result
  
  """
  Remove all duplicates from a given array of strings and return the resulting array.
  
  >>> removeDuplicates(['a', 'b', 'a', 'c', 'c', 'd'])
  ['a', 'b', 'c', 'd']
  """
output:     result = [] 
  
      # traverse for all elements 
      for i in arr: 
  
          # check if exists in result 
          if i not in result: 
              result.append(i) 
  
      # return result 
      return result