prize18-9  Exercise 1: Spotting Mixed Scripts
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Plan: take the first word of each letter's Unicode name (LATIN, GREEK, CYRILLIC ...) as its script. An ASCII-only string is trivially single script; a string
with letters from two scripts is mixed and worth rejecting for something like a user name.

ex1.py:

  import unicodedata as ud

  def scripts(s):
      return sorted({ud.name(c).split()[0] for c in s if c.isalpha()})

  names = ["google", "g\u03bfogle", "g\u043e\u043egle", "\u0433\u0443\u0433\u043b", "caf\u00e9", "x1"]
  for n in names:
      sc = scripts(n)
      verdict = "ascii-only" if n.isascii() else ("single script" if len(sc) == 1 else "MIXED")
      print(f"{ascii(n):34} {sc!s:24} {verdict}")

Real output (Python 3.14):

  'google'                           ['LATIN']                ascii-only
  'g\u03bfogle'                      ['GREEK', 'LATIN']       MIXED
  'g\u043e\u043egle'                 ['CYRILLIC', 'LATIN']    MIXED
  '\u0433\u0443\u0433\u043b'         ['CYRILLIC']             single script
  'caf\xe9'                          ['LATIN']                single script
  'x1'                               ['LATIN']                ascii-only

The Greek omicron and the Cyrillic o's are caught because they sit among Latin letters. The all-Cyrillic name passes: it is a single script, and a name made
entirely of Cyrillic look-alikes of Latin letters (for example one that visually reads as a Latin word) would pass too. That is the limit of a script check:
it finds mixing but not whole-script confusables; the UTS #39 skeleton comparison is designed for those. This sketch also uses the first word of the
character name, which is a rough stand-in for the Script_Extensions property.