@zhangyanling, Pay close attention to the instructions. Notice lines 11 and 13. You changed lines you were not supposed to change.
In the future, screenshots are not good for debugging.
If you have a question about a specific challenge as it relates to your written code for that challenge, just click the Ask for Help button located on the challenge. It will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.
Thank you.
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