input: Write a python function to convert a list of dates in the format YYYYMMDD to a list of tuples representing the day and month.
  assert calendarify([20221010, 20221111, 20221212]) == [(10, 10), (11, 11), (12, 12)]
  assert calendarify([19991231, 20000101]) == [(31, 12), (1, 1)]
  assert calendarify([20230115, 20230216]) == [(15, 1), (16, 2)]
output: def calendarify(dates):
      return [(int(str(date)[6:8]), int(str(date)[4:6])) for date in dates]