new_contents: def merge(a,b):
      """ Function to merge two arrays """
      c = []
      while len(a) != 0 and len(b) != 0:
          if a[0] < b[0]:
              c.append(a[0])
              a.remove(a[0])
          else:
              c.append(b[0])
              b.remove(b[0])
      if len(a) == 0:
          c += b
      else:
          c += a
      return c
  
  # Code for merge sort
  
  def mergesort(x):
      """ Function to sort an array using merge sort algorithm """
      if len(x) == 0 or len(x) == 1:
          return x
      else:
          middle = len(x)/2
          a = mergesort(x[:middle])
          b = mergesort(x[middle:])
  return merge(a,b)
  
subject: Create merge_SORT.py