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Requirements text =안녕, 아미고! However, when you have to give an answer, you must specify "안녕하세요, 아미고!" If this is the case, make sure that only English terms are used on the answer sheet. (The explanation should be in Korean text)

According to the requirements, I cannot change the variable text, but there is no way to print the right outcome without doing so. I got the correct answer not changing the variable text, but the outcome that I had is "안녕하세요, 아미고!", not "안녕, 아미고!". But the system said it is correct. Please check it out. Thank you.

The explanation says that there is a textbook. But I do not know where the textbook is. Where can I find the textbook?