stack.pop(); // 弹出无效候选值
12+[cal]: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202520260AB1043，详情可参考搜狗输入法2026
Bridgerton Season 4, Part 2 continues its Cinderella story to talk about class.，更多细节参见搜狗输入法下载
How to allocate stack
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