Write a function that converts an int num between 0-9 (inclusive) to its string equivalent (i.e., 1 -> "one").

def int_to_str(i):
  if i == 0:
    return "zero"
  elif i == 1:
    return "one"
  elif i == 2:
    return "two"
  elif i == 3:
    return "three"
  elif i == 4:
    return "four"
  elif i == 5:
    return "five"
  elif i == 6:
    return "six"
  elif i == 7:
    return "seven"
  elif i == 8:
    return "eight"
  elif i == 9:
    return "nine"
  else:
    return "Invalid argument"

int_to_str(5)