input: def removeDuplicates(arr):
      """
      Given an array of strings, remove all duplicates and return the resulting array.
      
      >>> removeDuplicates(['a', 'b', 'a', 'c', 'c', 'd'])
      ['a', 'b', 'c', 'd']
      >>> removeDuplicates(['apple', 'banana', 'apple', 'orange', 'banana'])
      ['apple', 'banana', 'orange']
      """
      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
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