input: Write a function to calculate the sum of all odd numbers between the limits l and r.
  assert sum_odd_between(2,5) == 8
  assert sum_odd_between(5,7) == 12
  assert sum_odd_between(7,13) == 40
output: def sum_odd_between(l, r):
      return sum(i for i in range(l, r + 1) if i % 2 != 0)