+ input = input[:index-1] + input[index:]
回顾近几年的A股IPO市场，其板块结构呈现出明显的“重制造、轻消费”特征。
，更多细节参见wps
}Match arms can contain any expression or block. A common pattern is returning from the enclosing function inside a match arm:
These high-voltage power lines are the latest front line in the battle over tech firms’ massive operations.，详情可参考谷歌
Government says new rights for parental leave and sick pay will increase equality and economic growth
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