input: Write a python function to find consecutive sequences in a list of numbers.
  assert get_consecutive([1, 2, 3, 7, 8, 9, 10]) == [(1, 3), (7, 10)]
  assert get_consecutive([4, 5, 6, 10, 11, 15]) == [(4, 6), (10, 11), (15, 15)]
  assert get_consecutive([1, 3, 4, 5, 7]) == [(1, 1), (3, 5), (7, 7)]
output: def get_consecutive(lst):
      if not lst:
          return []
      
      lst.sort()
      result = []
      start = lst[0]
      end = lst[0]
      
      for i in range(1, len(lst)):
          if lst[i] == end + 1:
              end = lst[i]
          else:
              result.append((start, end))
              start = lst[i]
              end = lst[i]
      
      result.append((start, end))
      return result