要打印这个片假名，后面再跟上一个笑脸符号，可以输入。
To print Katakana and follow it with a smiley face, enter this.
如果我们希望标记一下最后使用的符号，就可以对Flex规则进行扩展，并修改错误的打印。
If you want to mark the last consumed token, you have to expand the Flex rules and modify the printing of errors.
符号是一个有点怪异，让我问，如果这是一个路径我应该遵循和红色的非常微妙的融合一定会看起来像一个打印错误。
The symbol is a little weird and leaves me asking if it is a path I should follow and the very subtle blend in the red will surely look like an error in print.
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