例外情况，一个监听器将输入字符串转换成大写字母，而另一个将其转换成小写字母，这对于监听器所编写的代码都是完全相同的。

With the exception that one of the listeners converts the input string to uppercase, while the second converts the string to lowercase, the code for the listeners is exactly the same.

youdao

好的，一种处理这个问题的方法是将两个字符串变量($a)及目标文本(RIPT)都转换成小写或者大写字符。

Well, one way to handle that is to convert both the string variable ($a) and the target text (RIPT) to all-lowercase or all-uppercase characters. This command returns the value True

youdao