The rule of adding the suffix "xyz" holds for all inputs I tested. There doesn't seem to be any corruption in the domain where the rule applies.

To confirm, I will run the function on the provided list of words: ["Ankara", "The Barber of Seville", "The Grapes of Wrath", "Adam", "Lena", "López Obrador", "Stonehenge", "Spain", "star"].

COMMAND: PYTHON(./temp3/function.py "Ankara" "The Barber of Seville" "The Grapes of Wrath" "Adam" "Lena" "López Obrador" "Stonehenge" "Spain" "star")