input: Write a python function to check if a number is even or odd.
  assert check_even_odd(2) == "Even"
  assert check_even_odd(3) == "Odd"
  assert check_even_odd(10) == "Even"
  assert check_even_odd(15) == "Odd"
output: def check_even_odd(number):
      if number % 2 == 0:
          return "Even"
      else:
          return "Odd"