Ответ:

Clearly readable abbreviations include:

  • Sat — Saturday (суббота)
  • Dec — December (декабрь)
  • Rd — Road (дорога/улица)
  • St — Street (улица)
  • pm — post meridiem, afternoon/evening (после полудня)
  • LS11 5QG — a postcode (почтовый индекс), not a shortened word

Some further abbreviations may be present in invitations C and D, but those parts are not fully visible.

Answer: 5 clearly readable abbreviated words.