+#!/usr/bin/env python3
+
+import os
+
+import string_utils
+
+
+def is_running_as_root() -> bool:
+ return os.geteuid() == 0
+
+
+def is_are(n: int) -> str:
+ if n == 1:
+ return "is"
+ return "are"
+
+
+def pluralize(n: int) -> str:
+ if n == 1:
+ return ""
+ return "s"
+
+
+def thify(n: int) -> str:
+ digit = str(n)
+ assert string_utils.is_integer_number(digit)
+ digit = digit[-1:]
+ if digit == "1":
+ return "st"
+ elif digit == "2":
+ return "nd"
+ elif digit == "3":
+ return "rd"
+ else:
+ return "th"