input: Write a function to iterate over a list of numbers and print only the even numbers. If the list is empty, print "No numbers to process". If all numbers are odd, print "All numbers are odd". Otherwise, print each even number.
  assert print_evens([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])=="Output: 2\n4\n6\n8\n10"
  assert print_evens([1, 3, 5, 7, 9])=="All numbers are odd"
  assert print_evens([])=="No numbers to process"
  assert print_evens([2, 4, 6, 8, 10])=="Output: 2\n4\n6\n8\n10"
output: def print_evens(numbers):
      if not numbers:
          print("No numbers to process")
          return
      
      evens = [num for num in numbers if num % 2 == 0]
      
      if not evens:
          print("All numbers are odd")
      else:
          for num in evens:
              print(num)