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words = [input('enter a country name: ')]
while True:
    word = input('enter a country name starts with the last letter of previous country name: ')
    if word and word[0].lower() == words[-1][-1].lower():
        words.append(word)
    else:
        break
print(f"So sorry, The first letter of {word} does not match the last letter of {words[-1]}.")
print(f"Your word chain {words}")