Now, an attacker would need to find somewhere to input a malicious script.
现在，攻击者需要找到某个地方来输入恶意脚本。
You may input a secret code to ensure the safety of your money.
您可以输入一个密码保证您的存款的安全。
Use it to write a program that reverses its input a line at a time.
使用该函数编写一个程序，每次颠倒一个输入行中的字符顺序。
If no match is found within the input, a null value is returned.
如果在输入中未找到匹配项，则返回空值。
If no match is found within the input, a null value is returned.
如果在输入中未找到匹配项，则返回空值。
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